FEA Forums » Tag: Ansys

FEA Forums » Tag: Ansys - Recent Posts http://www.FEA-Forums.com/ FEA Forums » Tag: Ansys - Recent Posts en Sat, 11 Sep 2010 02:40:34 +0000 singh3508 on "solidworks to ansys" http://www.FEA-Forums.com/topic/207#post-265 Fri, 10 Sep 2010 00:42:46 +0000 singh3508 265@http://www.FEA-Forums.com/ i have a pipes 3d structure chassis model in solid works. i want to carry out analysis(structural and modal). how may i do that. please elaborate as its totally black box to me. thanx in advance singh3508 on "beam analysis" http://www.FEA-Forums.com/topic/206#post-264 Fri, 10 Sep 2010 00:38:20 +0000 singh3508 264@http://www.FEA-Forums.com/ we have to make a chassis model of a formula 1 type of car. its will be of circular tubes of 1 inch outer dia. and thickness is around 2 mm.its 3 dimensional network of pipes to impart strength to the car.we want to carry out stress analysis on it due to load coming on chassis with weight of car and cornering of a turn(it causes torsional moment in chassis of a car).there are few question i want to raise 1. we have modeled the 3 dimensional chassis as structure of lines in ansys multiphysics .co ordinates of each point were given and they were joined by lines and arcs.so chassis as a model of lines is ready. now what to do to give sectional properties to each element,outer diameter of all the pipes is same but they vary in thickness. 2.which type of element will be suitable(as far as i have understood, beam type element is needed,but i am not sure about beam188/beam189) 3.what parameters are required for accurate results, like yield strength ,poisons ratio., etc. what kind of material model to choose, and what material properties to feed in that. i am hoping for an early reply sir. abhishgva on "Very slow response from DesignModeler in Ansys Workbench 2.0" http://www.FEA-Forums.com/topic/204#post-262 Tue, 07 Sep 2010 01:50:23 +0000 abhishgva 262@http://www.FEA-Forums.com/ Hi guys!Hope someone can help me out with this one:I've been making a relatively simple geometry using DesignModeler. It is essentially a matrix of equally sized rectangles and each rectangle has within it another rectangle. In total there are about 250 to 300 rectangles. All this is in Sketch mode (so in 2D). Contraints like "Coincident", "Equal Length" and "Equal distance" were used to align all the rectangles in an orderly fashion.The problem is that as the number of rectangles increased (reached approximately 200+) the DesignModeler started responding extremely slowly in that, whenever I would change a dimension of a rectangle, or create a new one, it would take upto 2 mins for it to show up. This makes it impossible for me to finish the project (for which I have to modify all 250+ rectangles).At first sight, one may think that my pc has reached its processing limit. But I tried carrying out this project on a pc with 24GB of RAM and 8 intel i7 processors. The problem persisted.It really isn't a problem at the hardware level.Does anyone have a clue??Thanks for reading ! Hope someone can help ! magneto7 on "Extract Data from ansys" http://www.FEA-Forums.com/topic/194#post-251 Mon, 16 Aug 2010 23:28:29 +0000 magneto7 251@http://www.FEA-Forums.com/ Hello how to extract the data (solution, geometry, ...) of a problem modelled under ANSYS in text files? Thanks kulibyaka on "How to simulate movement in electrodynamics problem in Ansys?" http://www.FEA-Forums.com/topic/192#post-249 Sat, 14 Aug 2010 00:54:53 +0000 kulibyaka 249@http://www.FEA-Forums.com/ Consult please on a following question. It is necessary in Ansys to solve electrodynamics problem. The problem description (2D statement): is available opened yoke (for it magnetic permeability was set only, it was described by element PLANE13) with the coil (for the coil which was described by element PLANE53 and CIRCU124 magnetic permeability and specific resistance of a material was set). The constant magnet (for a magnet magnetic permeability and coercive force was set) is brought In a air gap of the yoke during some time interval (from 0 till 0.04 s). It is necessary to define as voltage and a current in the coil changes in due course. Has actually rested against a problem of the task of the movement of a magnet. How it to simulate? Tried to break all interval of time into some steps and on each step connected degree of freedom AZ for corresponding pair of knots (command CP), however at calculation the error took off. If somebody knows as to simulate movement in electrodynamics problem in Ansys, the huge request to impart experience. Thanks! Excuse for my English, I from Russia. gnana on "Unit" http://www.FEA-Forums.com/topic/169#post-214 Mon, 03 May 2010 22:16:55 +0000 gnana 214@http://www.FEA-Forums.com/ the output unit completely depends upon the unit of input value. you should use the value with correct unit for getting the correct result your youngs modulus should be N/mm2 and density should be kg/mm3 for obtaining displacement in mm rizwan on "Unit" http://www.FEA-Forums.com/topic/169#post-213 Sat, 01 May 2010 10:28:12 +0000 rizwan 213@http://www.FEA-Forums.com/ Hey, I am using Ansys 11.0 doing my thesis, i did modal analysis to extract eignvalue and i got 10 Mode shapes, i uused steel with parameter density ton/mm3 and yang's modulus in Mpa. I got reuslt freq, in Hz and maximum displacment and different nodes. I want to know the units of maximum displacement? i think it should be mm? Please reply me, here or on my e-mail id <a href="mailto:syedrizwanulhaq@hotmail.com">syedrizwanulhaq@hotmail.com</a> gnana on "need help in mapped meshing" http://www.FEA-Forums.com/topic/160#post-208 Sat, 24 Apr 2010 00:45:14 +0000 gnana 208@http://www.FEA-Forums.com/ the minimum condition for obtaining mapped mesh would be: the area should enclosed by only four lines hope it helps gnana leslie.lp2003 on "need help in mapped meshing" http://www.FEA-Forums.com/topic/160#post-189 Fri, 26 Mar 2010 07:08:56 +0000 leslie.lp2003 189@http://www.FEA-Forums.com/ Hi, I'm a student who's doing a project on strains n stresses due to thermal gradients in an antenna reflector. I'm very new to the software n know only the basics of FEA. I've managed to make a CAD model of the reflector but finding it difficult to carry out mapped meshing. I wud greatly appreciate if some one could guide me to mesh the reflector. Thank you Leslie Silvia_Petkova on "How to apply seismic support excitation in WB,Flexible Dynam" http://www.FEA-Forums.com/topic/151#post-179 Tue, 23 Feb 2010 05:32:31 +0000 Silvia_Petkova 179@http://www.FEA-Forums.com/ Hello, I have to "shake" my Model ( Soil - Steel pipe - Pressured Water) in WB, Flexible dynamic + CFX , MultiField Solver to solves FSI and I am at a loss: whether the using of Joint ("Soil "Body to Ground) and than applying Joint condition (acceleration time history along Z), in WB Simulation, is a good idea for transmission of “Seismic support excitation” or there is some better way? CdriK on "Plot the results" http://www.FEA-Forums.com/topic/148#post-176 Wed, 17 Feb 2010 12:06:18 +0000 CdriK 176@http://www.FEA-Forums.com/ Hello, i do ten load step on Ansys, and when i change step, i must do a new nodal solu, for ploting the good scale of stress. If i don't do this, i always have the result for the first step.... It's normal, or i need to change something in my parameters?? ajdowdell on "Axisymetric issue" http://www.FEA-Forums.com/topic/140#post-164 Thu, 14 Jan 2010 14:45:52 +0000 ajdowdell 164@http://www.FEA-Forums.com/ Wow... I've triple checked to make sure that is says axisymmetric, but I had to click it off, then return to axisymetric and i then corrected the thickenesses back to zero.. Frustrating.. Thanks! ajdowdell on "Axisymetric issue" http://www.FEA-Forums.com/topic/140#post-163 Thu, 14 Jan 2010 13:53:44 +0000 ajdowdell 163@http://www.FEA-Forums.com/ I've got a sruface model, that has thickness = 0 in Design modeler. Then once I transfer it into simulation (in 2D mode accepting 0 thickness models only) some of the surface models gain a thickness specification that is assigned as 1. You cannot go in to the thickness field in the details box and set thickness to 0 because then it puts a ? infront of the object,and won't solve at all. Sometimes all objects are assign a thickness of 1, sometimes one object remains a true "thin" surface. In my little world since it's set on axisymetric, there should be NO option for a thickness. Assigning a thickness to an axisymetric thin model is not even really comprehensible... This if from the help menu: Importing Surface Body Thickness Surface body thickness will be imported from CAD (including DesignModeler) if, and only if, the existing surface body thickness value in Simulation is set to 0 (zero). This is true on initial attach and if you set the surface body thickness value to zero prior to an update. This allows you the flexibility of updating surface body thickness values from CAD or not. That to me means that the model must be correct coming out of DM into sim, and that the thickness has to be added in the simulation somewhere. Does any one know where the setting might be to change this or have any ideas? Thanks! sharad on "Find the max pressure location on body which is having wind force" http://www.FEA-Forums.com/topic/120#post-142 Tue, 06 Oct 2009 22:32:22 +0000 sharad 142@http://www.FEA-Forums.com/ I have a model which is having wind force and i want to know the location that where the max force is applying. didriksenclaus on "problems using VSBV command" http://www.FEA-Forums.com/topic/111#post-133 Wed, 09 Sep 2009 12:30:33 +0000 didriksenclaus 133@http://www.FEA-Forums.com/ HEY all. I have a problem using the VSBV command in ansys. I have created two bricks on top of eachother and want to subtract a cylinder volume through these. I named the bricks TOP and BUND by using the command: CM,BUND,VOLU ect. and want to create and subtract the cylinder using these commands: CYLIND,d/2,,-h,h,, CM,CYL,VOLU VSEL,,,,TOP,,,1 VSEL,,,,BUND,,,1 VSEL,,,,CYL,,,1 VSBV,ALL,CYL,,, but ansys gives me the error 'Volume list to be subtracted is empty.' Please write if you know what to do. best regards Claus PRABHAT on "turbocharger stability analysis" http://www.FEA-Forums.com/topic/100#post-122 Fri, 24 Jul 2009 03:16:12 +0000 PRABHAT 122@http://www.FEA-Forums.com/ hi, this is prabhat i want to do turbocahrger stability analysis(rotordynamics analysis) for an automotive engine in ansys10 .can any one please tell me how to go for the same. Prabhat Kumar, KOEL,PUNE India Mohdim on "Providing the Stiffness matrix to Ansys structural" http://www.FEA-Forums.com/topic/90#post-112 Thu, 11 Jun 2009 01:02:01 +0000 Mohdim 112@http://www.FEA-Forums.com/ Hello, I am new to Ansys, I was wondering if anyone knows if we can provide Ansys structural not only with the loads, but also with a specific stiffness matrix to solve the displacements for us (it will be then working as a linear solver). I mean I do not want to provide Ansys with only the Modulus of Elasticity (and then it calculates the stiffness matrix internally), but rather with the whole stiffness matrix in order to get the displacements. Thanks for your time Regards khaled-tofighi on "nonlinear buckling" http://www.FEA-Forums.com/topic/87#post-109 Thu, 28 May 2009 14:38:49 +0000 khaled-tofighi 109@http://www.FEA-Forums.com/ I solve a nonlinear buckling of imperfect column.but its answer is wrong! because its load-mid deflection must be incremental then fall.the result of Ansys is always incremental!!! please help me. zeropayne on "assembly analysis in ANSYS" http://www.FEA-Forums.com/topic/86#post-108 Sun, 10 May 2009 22:56:21 +0000 zeropayne 108@http://www.FEA-Forums.com/ Hi I am trying to perform a structural analysis on an assembly with more than 400 parts....can any1 point to any tutorials which deals with this kind of analysis?? .... is ANSYS gud for this kind of analysis or any other software wud be better? like Abaqus or Algor? erpreet on "Error while meshing" http://www.FEA-Forums.com/topic/85#post-107 Sat, 09 May 2009 18:57:46 +0000 erpreet 107@http://www.FEA-Forums.com/ I designed a part in solidworks using weldment (piping structure).... When i saved the file in *.igs and import it to ansys workbench it takes a lot of time and secondly some surface part show 0 thickness error pls help to solve the problem. for testing purpose i gave a thickness of .1mm to the surface showing error... then on meshing after taking a long time i got an error...... Error: The mesher did not generate any nodes. All geometry may have been defeatured away. DannyMaher on "Structurak Damping" http://www.FEA-Forums.com/topic/81#post-103 Tue, 07 Apr 2009 13:29:35 +0000 DannyMaher 103@http://www.FEA-Forums.com/ I was wondering if anyone has some insight on how to take into account a value of 5% strucutral damping in ANSYS to assess fatigue damage. I am new to the program, and do not know how to use batch files or the command prompts yet, I use the GUI. Any hlep would be much appreciated. Thanks -Dan bhaleraosatish on "ANSYS soft copy book" http://www.FEA-Forums.com/topic/66#post-88 Tue, 09 Dec 2008 21:22:58 +0000 bhaleraosatish 88@http://www.FEA-Forums.com/ Anybody is having ansys soft copy book where all the tutorial are explained. please send me on <a href="mailto:satish.b.bhalerao@in.abb.com">satish.b.bhalerao@in.abb.com</a> jake08 on "adding dofs to an element" http://www.FEA-Forums.com/topic/65#post-87 Mon, 01 Dec 2008 09:55:58 +0000 jake08 87@http://www.FEA-Forums.com/ Hi is there anyway to add unexisting degrees of freedom to an element in ansys? I am using a link element (link8) which has translational degrees of freedom in x y an z directions but would like to extend it to have rotational degree of freedom about the z axis. Can someone please help. rammmy on "Define electrode on the surface" http://www.FEA-Forums.com/topic/63#post-84 Mon, 10 Nov 2008 06:25:04 +0000 rammmy 84@http://www.FEA-Forums.com/ Dear friends, I modeled a 3-d block ,after that I glue it with another block on the top surface the I defined the upper layer with solid226(piezoelectric element). as you know with applying force on piezoelectric layer we can see the generated voltage , but this show electrical voltage on all of the piezo nodes . and this is very huge of data. because of that I want to define some electrode on the piezo layer to see the sum voltage on any defined electord part ( as shown in ANSYS tutorial with the title of Sample piezoelectric Analysis ) bu I don't know how to do it in 3D model!!!! avicent on "how drawing 3D elliptical bodies in ANSYS" http://www.FEA-Forums.com/topic/57#post-75 Sun, 14 Sep 2008 09:53:10 +0000 avicent 75@http://www.FEA-Forums.com/ someone can help me to draw 3D elliptical bodies using ANSYS? royaleagle on "need help in nonlinear buckling analysis of a curved panel" http://www.FEA-Forums.com/topic/47#post-62 Fri, 30 May 2008 12:32:01 +0000 royaleagle 62@http://www.FEA-Forums.com/ hi guys , am student of aerospace engg , am doing project on nonlinear buckling of a curved composite panel with a circular cutout , the prob i had that when i run the nonlinear analysis , it got terminated nd reason for that shows as "" DOF limit exceeded"" i tried all possiblties to solve that prob bt i cdnt >>> can any body help me plz >>> aykut on "Barrel-Stave Transducer Quality Factor Problem" http://www.FEA-Forums.com/topic/42#post-53 Tue, 06 May 2008 03:45:49 +0000 aykut 53@http://www.FEA-Forums.com/ Hi, I am trying to design a barrel-stave flextensional transducer using ANSYS. I have obtained the desired resonance frequency, but I have a problem with the quality factor of transducer. I expect to get it about 4, but I have obtained it about 15. If you have any ideas regarding this problem, I would be pleased. Arthanareeswaran on "Modal analysis of Tractor Semi trailer (2D model)" http://www.FEA-Forums.com/topic/40#post-50 Fri, 25 Apr 2008 06:06:53 +0000 Arthanareeswaran 50@http://www.FEA-Forums.com/ Hai I have used MPC 184 element in Ansys to model the hinge between tractor and trailer. But when I perform modal analysis, it results with frequency of zero and mode shapes are in z direction. I have used beam3, combin14 (uy direction) and mass element. Pl suggest me how to model the system. dadan on "Inductor analusis problem in ANSYS" http://www.FEA-Forums.com/topic/39#post-49 Wed, 16 Apr 2008 09:36:28 +0000 dadan 49@http://www.FEA-Forums.com/ If somebody can help me , or if you can give me for shure some e-mail address, please do. I have a problem doing analysis of meander line on Si substrate. Iâ€™m working HF electromagnetic analzysis in Ansys 10 Multiphysich. Substrate is 760x760 micrometer, and 400micrometer hight.On top of it there is SiO2 layer of 5 micrometer of thickness, and then gos meander line whosw with is 40 micrometer and thisknes is 8 nicrometer.I cant get good S parameters wich I then use to get Q an L. I'd tried over fifty diferent combinations of excitations and boundary conditions without succession. If somebody can tell me what about rules for current and port excitation and boundary conditions for this particular case wich is diferent from those from HF guides in ANSYS please do. Here goes my comand metod example (on this structure I'd tried those combinations) so that you can see how I treat this case.As I said this is just one of many of my combinations that I'd tried. !-------- COMAND METOD------------ /prep7 /units,SI tunif,25 ! --- define elements and materials --- epsr_SiO2=3.9 epsr_Si=11.9 et,11,200,7 et,1,120,1,,,0 !normal element et,2,120,1,,,1 !PML element ! air mp,murx,1,1. mp,perx,1,1. ! Cu mp,murx,2,1. mp,perx,2,1. mp,rsvx,2,1.724e-8 ! SiO2 mp,murx,3,1 mp,perx,3,epsr_SiO2 mp,rsvx,3,1e12 ! Si mp,murx,4,1. mp,perx,4,epsr_Si mp,rsvx,4,0.1 ! --- set up geometry --- LOCAL, 11, 0, 0, 0, 0, 0, 90 wpcsys, , 11 s=40 krak=120 str=160 vazd=2000 cu=8 sio2=-5 si=-400 pml=8000 *dim,_a,array,10 *dim,_b,array,22 _a(1)=-380 _a(2)=_a(1)+str _a(3)=_a(2)+s _a(4)=_a(3)+s _a(5)=_a(4)+krak _a(6)=_a(5)+s _a(7)=_a(6)+krak _a(8)=_a(7)+s _a(9)=_a(8)+s _a(10)=_a(9)+str _b(1)=-8240 _b(2)=_b(1)+pml _b(3)=_b(2)+krak _b(4)=_b(3)+krak _b(5)=_b(4)+krak *do,_i,6,16,2 _b(_i)=_b(_i-1)+s _b(_i+1)=_b(_i)+s *enddo _b(18)=_b(17)+s _b(19)=_b(18)+krak _b(20)=_b(19)+krak _b(21)=_b(20)+krak _b(22)=_b(21)+pml *do,_i,1,9 *do,_j,1,21 rect,_a(_i),_a(_i+1),_b(_j),_b(_j+1) *enddo aglue,all numcmp,area *enddo aglue,all *do,_i,1,9 a=_i *if,a,EQ,2,then asel,none asel, a, area, , (a)*21+7, (a)*21+9,1 asel, a, area, , (a)*21+11, (a)*21+13,1 asel, a, area, , (a)*21+15, (a)*21+17,1 cm,traka,area *elseif,a,EQ,3,then asel,none cmsel,a, traka asel,a, area, , (a)*21+7, (a)*21+9,2 asel,a, area, , (a)*21+11, (a)*21+13,2 asel,a, area, , (a)*21+15, (a)*21+17,2 cm,traka,area *elseif,a,EQ,4,then asel,none cmsel,a, traka asel,a, area, , (a)*21+1, (a+1)*21,1 asel,u, area, , a*21+6, a*21+16,2 cm,traka,area *elseif,a,EQ,5,then asel,none cmsel,a, traka asel,a, area, , (a)*21+5, (a)*21+7,2 asel,a, area, , (a)*21+9, (a)*21+11,2 asel,a, area, , (a)*21+13, (a)*21+15,2 cm,traka,area *elseif,a,EQ,6,then asel,none cmsel,a, traka asel,a, area, , (a)*21+5, (a)*21+7,1 asel,a, area, , (a)*21+9, (a)*21+11,1 asel,a, area, , (a)*21+13, (a)*21+15,1 cm,traka,area *endif *enddo cmsel,s, traka ! asel, inve cm,oko_trake,area csys,0 alls alls LESIZE, all, 40, , , , 1 lsel,r,loc,z,(_b(1)+_b(2))*0.5 lsel,a,loc,z,(_b(21)+_b(22))*0.5 LESIZE, all, , , 4, , 1 alls lsel,r,loc,z,(_b(2)+_b(3))*0.5 lsel,a,loc,z,(_b(3)+_b(4))*0.5 lsel,a,loc,z,(_b(4)+_b(5))*0.5 lsel,a,loc,z,(_b(18)+_b(19))*0.5 lsel,a,loc,z,(_b(19)+_b(20))*0.5 lsel,a,loc,z,(_b(20)+_b(21))*0.5 LESIZE, all, , , 3, , 1 lsel,u,loc,z,_b(4),_b(19) lsel,u,loc,x,_a(5),_a(6) LESIZE, all, , , 1, , 1 alls lsel,r,loc,x,(_a(1)+_a(2))*0.5 lsel,a,loc,x,(_a(9)+_a(10))*0.5 LESIZE, all, , , 3, , 1 lsel,u,loc,z,_b(5),_b(18) LESIZE, all, , , 1, , 1 alls lsel,r,loc,x,(_a(2)+_a(3))*0.5 lsel,a,loc,x,(_a(7)+_a(8))*0.5 LESIZE, all, , , 3, , 1 lsel,u,loc,z,_b(7),_b(17) LESIZE, all, , , 1, , 1 alls lsel,r,loc,x,(_a(5)+_a(6))*0.5 lsel,u,loc,z,_b(6),_b(17) LESIZE, all, , , 4, , 1 alls lsel,r,loc,z,(_b(5)+_b(6))*0.5 lsel,r,loc,x,_a(6),_a(10) LESIZE, all, , , 4, , 1 lsel,r,loc,x,_a(8),_a(10) LESIZE, all, , , 2, , 1 alls lsel,r,loc,z,(_b(17)+_b(18))*0.5 lsel,r,loc,x,_a(1),_a(5) LESIZE, all, , , 2, , 1 lsel,r,loc,x,_a(4),_a(5) LESIZE, all, , , 4, , 1 alls lsel,none *do,j,8,16,4 lsel,a,loc,z,_b(j) lsel,a,loc,z,_b(j+1) *enddo lsel,r,loc,x,(_a(3)+_a(4))*0.5 LESIZE, all, , , 4, , 1 lsel,none *do,j,6,14,4 lsel,a,loc,z,_b(j) lsel,a,loc,z,_b(j+1) *enddo lsel,r,loc,x,(_a(7)+_a(8))*0.5 LESIZE, all, , , 4, , 1 alls lsel,none *do, i,7,16,2 lsel,a,loc,z,(_b(i)+_b(i+1))*0.5 *enddo lsel,r,loc,x,_a(4),_a(7) LESIZE, all, , , 4, , 1 alls lsel,none *do, i,7,16,2 lsel,a,loc,z,(_b(i)+_b(i+1))*0.5 *enddo lsel,u,loc,x,_a(4),_a(7) LESIZE, all, , , 2, , 1 alls lsel,r,loc,z,(_b(6)+_b(7))*0.5 LESIZE, all, , , 3, , 1 lsel,r,loc,x,_a(1),_a(3) LESIZE, all, , , 1, , 1 alls lsel,r,loc,z,(_b(16)+_b(17))*0.5 LESIZE, all, , , 3, , 1 lsel,r,loc,x,_a(8),_a(10) LESIZE, all, , , 1, , 1 alls lsel,none *do, i,8,17,4 lsel,a,loc,z,(_b(i)+_b(i+1))*0.5 *enddo LESIZE, all, , , 3, , 1 lsel,r,loc,x,_a(8),_a(10) LESIZE, all, , , 1, , 1 alls lsel,none *do, i,10,15,4 lsel,a,loc,z,(_b(i)+_b(i+1))*0.5 *enddo LESIZE, all, , , 3, , 1 lsel,r,loc,x,_a(1),_a(3) LESIZE, all, , , 1, , 1 alls *do, i,8,17,4 lsel,u,loc,z,_b(i) lsel,u,loc,z,_b(i+1) *enddo lsel,r,loc,x,(_a(3)+_a(4))*0.5 LESIZE, all, , , 2, , 1 alls *do, i,6,15,4 lsel,u,loc,z,_b(i) lsel,u,loc,z,_b(i+1) *enddo lsel,r,loc,x,(_a(7)+_a(8))*0.5 LESIZE, all, , , 2, , 1 alls lsel,r,loc,z,(_b(5)+_b(6))*0.5 lsel,r,loc,x,_a(1),_a(5) LESIZE, all, , , 1, , 1 alls lsel,r,loc,z,(_b(17)+_b(18))*0.5 lsel,r,loc,x,_a(6),_a(10) LESIZE, all, , , 1, , 1 alls lsel,r,loc,x,(_a(5)+_a(6))*0.5 lsel,r,loc,z,_b(6),_b(17) LESIZE, all, , , 1, , 1 alls alls MSHKEY, 1 /pnum,mat,1 /number,1 extopt,on type,11 cmsel,s,oko_trake AATT, 1, , 11, 0 cmsel,s,traka AATT, 2, , 11, 0 alls amesh,all type,1 esize,,1 alls vext,all,,,0,cu,0 alls vsel,s,mat,,1 vclear,all vatt,1,,1,0 vsel,u,loc,z,_b(2),_b(21) vatt,1,,2,0 alls vsel,s,mat,,2 vclear,all vatt,2,,1,0 vsel,u,loc,z,_b(2),_b(21) vatt,2,,2,0 alls aclear,all type,1 mat,3 esize,,4 asel,s,loc,y,0 vext,all,,,0,sio2,0 alls vsel,s,loc,y,0,sio2 vatt,3,,1,0 vsel,u,loc,z,_b(2),_b(21) vatt,3,,2,0 alls type,1 mat,4 esize,,7 asel,s,loc,y,sio2 vext,all,,,0,si,0 alls vsel,s,loc,y,sio2,si vatt,4,,1,0 vsel,u,loc,z,_b(2),_b(21) vatt,4,,2,0 alls type,1 mat,1 esize,,10 asel,s,loc,y,cu vext,all,,,0,vazd,0 alls vsel,s,loc,y,cu,vazd vatt,1,,1,0 vsel,u,loc,z,_b(2),_b(21) vatt,1,,2,0 alls AATT, 1, , 11, 0 aclear,all lsel,r,loc,y,1,7 LESIZE, all, , , 1, , 1 alls lsel,r,loc,y,-1,-4 LESIZE, all, , , 4, , 1 alls lsel,r,loc,y,9,1990 LESIZE, all, , , 10, , 1 alls lsel,r,loc,y,-6,-390 LESIZE, all, , , 7, , 1 alls vmesh,all ! --- PEC surfaces alls asel,r,ext da,all,ax,0. alls ! --- SHLD boundary conditions --- vsel,s,mat,,2 asel,r,ext asel,r,loc,z,-8e-3,8.7e-3 cm,cu_plast,area SFA, all, 1, shld, 0.56e8, 1 alls vsel,s,mat,,4 asel,r,ext asel,r,loc,z,-8e-3,8.7e-3 cm,si_plast,area SFA, all, 1, shld, 10, 1 ! --- pobudna struja u Z=-120 --- asel,s,loc,z,_b(3) asel,r,loc,x,_a(5),_a(6) asel,r,loc,y,si+sio2,0 bfa,all,js,0,1,0,-1 alls ! --- transmission line port --- hfport,1,TLINE,,v1,,50 asel,s,loc,z,_b(4) bfa,all,port,1 hfport,2,TLINE,,v2,,50 asel,s,loc,z,_b(19) bfa,all,port,2 scal=1e-6 vlscale,all,,,scal,scal,scal,,,1 ! --- voltage paths --- z1=scal*_b(4) xv1=scal*0.5*(_a(5)+_a(6)) yv1=scal*(si+sio2) yv2=8e-6 nv11=node(xv1,yv1,z1) nv12=node(xv1,yv2,z1) path,v1,2 ppath,1,nv11 ppath,2,nv12 z2=scal*_b(19) nv21=node(xv1,yv1,z2) nv22=node(xv1,yv2,z2) path,v2,2 ppath,1,nv21 ppath,2,nv22 pasave,all alls vclear,all vmesh,all sbctran save fini ! --- solution --- /solu spswp,1.e9,5e9,5.e8,1,,1,2 fin dadan on "Inductor analysis problem in ANSYS" http://www.FEA-Forums.com/topic/37#post-47 Wed, 16 Apr 2008 09:34:22 +0000 dadan 47@http://www.FEA-Forums.com/ If somebody can help me , or if you can give me for shure some e-mail address, please do. I have a problem doing analysis of meander line on Si substrate. Iâ€™m working HF electromagnetic analzysis in Ansys 10 Multiphysich. Substrate is 760x760 micrometer, and 400micrometer hight.On top of it there is SiO2 layer of 5 micrometer of thickness, and then gos meander line whosw with is 40 micrometer and thisknes is 8 nicrometer.I cant get good S parameters wich I then use to get Q an L. I'd tried over fifty diferent combinations of excitations and boundary conditions without succession. If somebody can tell me what about rules for current and port excitation and boundary conditions for this particular case wich is diferent from those from HF guides in ANSYS please do. Here goes my comand metod example (on this structure I'd tried those combinations) so that you can see how I treat this case.As I said this is just one of many of my combinations that I'd tried. !-------- COMAND METOD------------ /prep7 /units,SI tunif,25 ! --- define elements and materials --- epsr_SiO2=3.9 epsr_Si=11.9 et,11,200,7 et,1,120,1,,,0 !normal element et,2,120,1,,,1 !PML element ! air mp,murx,1,1. mp,perx,1,1. ! Cu mp,murx,2,1. mp,perx,2,1. mp,rsvx,2,1.724e-8 ! SiO2 mp,murx,3,1 mp,perx,3,epsr_SiO2 mp,rsvx,3,1e12 ! Si mp,murx,4,1. mp,perx,4,epsr_Si mp,rsvx,4,0.1 ! --- set up geometry --- LOCAL, 11, 0, 0, 0, 0, 0, 90 wpcsys, , 11 s=40 krak=120 str=160 vazd=2000 cu=8 sio2=-5 si=-400 pml=8000 *dim,_a,array,10 *dim,_b,array,22 _a(1)=-380 _a(2)=_a(1)+str _a(3)=_a(2)+s _a(4)=_a(3)+s _a(5)=_a(4)+krak _a(6)=_a(5)+s _a(7)=_a(6)+krak _a(8)=_a(7)+s _a(9)=_a(8)+s _a(10)=_a(9)+str _b(1)=-8240 _b(2)=_b(1)+pml _b(3)=_b(2)+krak _b(4)=_b(3)+krak _b(5)=_b(4)+krak *do,_i,6,16,2 _b(_i)=_b(_i-1)+s _b(_i+1)=_b(_i)+s *enddo _b(18)=_b(17)+s _b(19)=_b(18)+krak _b(20)=_b(19)+krak _b(21)=_b(20)+krak _b(22)=_b(21)+pml *do,_i,1,9 *do,_j,1,21 rect,_a(_i),_a(_i+1),_b(_j),_b(_j+1) *enddo aglue,all numcmp,area *enddo aglue,all *do,_i,1,9 a=_i *if,a,EQ,2,then asel,none asel, a, area, , (a)*21+7, (a)*21+9,1 asel, a, area, , (a)*21+11, (a)*21+13,1 asel, a, area, , (a)*21+15, (a)*21+17,1 cm,traka,area *elseif,a,EQ,3,then asel,none cmsel,a, traka asel,a, area, , (a)*21+7, (a)*21+9,2 asel,a, area, , (a)*21+11, (a)*21+13,2 asel,a, area, , (a)*21+15, (a)*21+17,2 cm,traka,area *elseif,a,EQ,4,then asel,none cmsel,a, traka asel,a, area, , (a)*21+1, (a+1)*21,1 asel,u, area, , a*21+6, a*21+16,2 cm,traka,area *elseif,a,EQ,5,then asel,none cmsel,a, traka asel,a, area, , (a)*21+5, (a)*21+7,2 asel,a, area, , (a)*21+9, (a)*21+11,2 asel,a, area, , (a)*21+13, (a)*21+15,2 cm,traka,area *elseif,a,EQ,6,then asel,none cmsel,a, traka asel,a, area, , (a)*21+5, (a)*21+7,1 asel,a, area, , (a)*21+9, (a)*21+11,1 asel,a, area, , (a)*21+13, (a)*21+15,1 cm,traka,area *endif *enddo cmsel,s, traka ! asel, inve cm,oko_trake,area csys,0 alls alls LESIZE, all, 40, , , , 1 lsel,r,loc,z,(_b(1)+_b(2))*0.5 lsel,a,loc,z,(_b(21)+_b(22))*0.5 LESIZE, all, , , 4, , 1 alls lsel,r,loc,z,(_b(2)+_b(3))*0.5 lsel,a,loc,z,(_b(3)+_b(4))*0.5 lsel,a,loc,z,(_b(4)+_b(5))*0.5 lsel,a,loc,z,(_b(18)+_b(19))*0.5 lsel,a,loc,z,(_b(19)+_b(20))*0.5 lsel,a,loc,z,(_b(20)+_b(21))*0.5 LESIZE, all, , , 3, , 1 lsel,u,loc,z,_b(4),_b(19) lsel,u,loc,x,_a(5),_a(6) LESIZE, all, , , 1, , 1 alls lsel,r,loc,x,(_a(1)+_a(2))*0.5 lsel,a,loc,x,(_a(9)+_a(10))*0.5 LESIZE, all, , , 3, , 1 lsel,u,loc,z,_b(5),_b(18) LESIZE, all, , , 1, , 1 alls lsel,r,loc,x,(_a(2)+_a(3))*0.5 lsel,a,loc,x,(_a(7)+_a(8))*0.5 LESIZE, all, , , 3, , 1 lsel,u,loc,z,_b(7),_b(17) LESIZE, all, , , 1, , 1 alls lsel,r,loc,x,(_a(5)+_a(6))*0.5 lsel,u,loc,z,_b(6),_b(17) LESIZE, all, , , 4, , 1 alls lsel,r,loc,z,(_b(5)+_b(6))*0.5 lsel,r,loc,x,_a(6),_a(10) LESIZE, all, , , 4, , 1 lsel,r,loc,x,_a(8),_a(10) LESIZE, all, , , 2, , 1 alls lsel,r,loc,z,(_b(17)+_b(18))*0.5 lsel,r,loc,x,_a(1),_a(5) LESIZE, all, , , 2, , 1 lsel,r,loc,x,_a(4),_a(5) LESIZE, all, , , 4, , 1 alls lsel,none *do,j,8,16,4 lsel,a,loc,z,_b(j) lsel,a,loc,z,_b(j+1) *enddo lsel,r,loc,x,(_a(3)+_a(4))*0.5 LESIZE, all, , , 4, , 1 lsel,none *do,j,6,14,4 lsel,a,loc,z,_b(j) lsel,a,loc,z,_b(j+1) *enddo lsel,r,loc,x,(_a(7)+_a(8))*0.5 LESIZE, all, , , 4, , 1 alls lsel,none *do, i,7,16,2 lsel,a,loc,z,(_b(i)+_b(i+1))*0.5 *enddo lsel,r,loc,x,_a(4),_a(7) LESIZE, all, , , 4, , 1 alls lsel,none *do, i,7,16,2 lsel,a,loc,z,(_b(i)+_b(i+1))*0.5 *enddo lsel,u,loc,x,_a(4),_a(7) LESIZE, all, , , 2, , 1 alls lsel,r,loc,z,(_b(6)+_b(7))*0.5 LESIZE, all, , , 3, , 1 lsel,r,loc,x,_a(1),_a(3) LESIZE, all, , , 1, , 1 alls lsel,r,loc,z,(_b(16)+_b(17))*0.5 LESIZE, all, , , 3, , 1 lsel,r,loc,x,_a(8),_a(10) LESIZE, all, , , 1, , 1 alls lsel,none *do, i,8,17,4 lsel,a,loc,z,(_b(i)+_b(i+1))*0.5 *enddo LESIZE, all, , , 3, , 1 lsel,r,loc,x,_a(8),_a(10) LESIZE, all, , , 1, , 1 alls lsel,none *do, i,10,15,4 lsel,a,loc,z,(_b(i)+_b(i+1))*0.5 *enddo LESIZE, all, , , 3, , 1 lsel,r,loc,x,_a(1),_a(3) LESIZE, all, , , 1, , 1 alls *do, i,8,17,4 lsel,u,loc,z,_b(i) lsel,u,loc,z,_b(i+1) *enddo lsel,r,loc,x,(_a(3)+_a(4))*0.5 LESIZE, all, , , 2, , 1 alls *do, i,6,15,4 lsel,u,loc,z,_b(i) lsel,u,loc,z,_b(i+1) *enddo lsel,r,loc,x,(_a(7)+_a(8))*0.5 LESIZE, all, , , 2, , 1 alls lsel,r,loc,z,(_b(5)+_b(6))*0.5 lsel,r,loc,x,_a(1),_a(5) LESIZE, all, , , 1, , 1 alls lsel,r,loc,z,(_b(17)+_b(18))*0.5 lsel,r,loc,x,_a(6),_a(10) LESIZE, all, , , 1, , 1 alls lsel,r,loc,x,(_a(5)+_a(6))*0.5 lsel,r,loc,z,_b(6),_b(17) LESIZE, all, , , 1, , 1 alls alls MSHKEY, 1 /pnum,mat,1 /number,1 extopt,on type,11 cmsel,s,oko_trake AATT, 1, , 11, 0 cmsel,s,traka AATT, 2, , 11, 0 alls amesh,all type,1 esize,,1 alls vext,all,,,0,cu,0 alls vsel,s,mat,,1 vclear,all vatt,1,,1,0 vsel,u,loc,z,_b(2),_b(21) vatt,1,,2,0 alls vsel,s,mat,,2 vclear,all vatt,2,,1,0 vsel,u,loc,z,_b(2),_b(21) vatt,2,,2,0 alls aclear,all type,1 mat,3 esize,,4 asel,s,loc,y,0 vext,all,,,0,sio2,0 alls vsel,s,loc,y,0,sio2 vatt,3,,1,0 vsel,u,loc,z,_b(2),_b(21) vatt,3,,2,0 alls type,1 mat,4 esize,,7 asel,s,loc,y,sio2 vext,all,,,0,si,0 alls vsel,s,loc,y,sio2,si vatt,4,,1,0 vsel,u,loc,z,_b(2),_b(21) vatt,4,,2,0 alls type,1 mat,1 esize,,10 asel,s,loc,y,cu vext,all,,,0,vazd,0 alls vsel,s,loc,y,cu,vazd vatt,1,,1,0 vsel,u,loc,z,_b(2),_b(21) vatt,1,,2,0 alls AATT, 1, , 11, 0 aclear,all lsel,r,loc,y,1,7 LESIZE, all, , , 1, , 1 alls lsel,r,loc,y,-1,-4 LESIZE, all, , , 4, , 1 alls lsel,r,loc,y,9,1990 LESIZE, all, , , 10, , 1 alls lsel,r,loc,y,-6,-390 LESIZE, all, , , 7, , 1 alls vmesh,all ! --- PEC surfaces alls asel,r,ext da,all,ax,0. alls ! --- SHLD boundary conditions --- vsel,s,mat,,2 asel,r,ext asel,r,loc,z,-8e-3,8.7e-3 cm,cu_plast,area SFA, all, 1, shld, 0.56e8, 1 alls vsel,s,mat,,4 asel,r,ext asel,r,loc,z,-8e-3,8.7e-3 cm,si_plast,area SFA, all, 1, shld, 10, 1 ! --- pobudna struja u Z=-120 --- asel,s,loc,z,_b(3) asel,r,loc,x,_a(5),_a(6) asel,r,loc,y,si+sio2,0 bfa,all,js,0,1,0,-1 alls ! --- transmission line port --- hfport,1,TLINE,,v1,,50 asel,s,loc,z,_b(4) bfa,all,port,1 hfport,2,TLINE,,v2,,50 asel,s,loc,z,_b(19) bfa,all,port,2 scal=1e-6 vlscale,all,,,scal,scal,scal,,,1 ! --- voltage paths --- z1=scal*_b(4) xv1=scal*0.5*(_a(5)+_a(6)) yv1=scal*(si+sio2) yv2=8e-6 nv11=node(xv1,yv1,z1) nv12=node(xv1,yv2,z1) path,v1,2 ppath,1,nv11 ppath,2,nv12 z2=scal*_b(19) nv21=node(xv1,yv1,z2) nv22=node(xv1,yv2,z2) path,v2,2 ppath,1,nv21 ppath,2,nv22 pasave,all alls vclear,all vmesh,all sbctran save fini ! --- solution --- /solu spswp,1.e9,5e9,5.e8,1,,1,2 fin