Thank you for the video!!!

Thank you sir

Hi sir, if I model according to this, what would be the boundary condition between the finite soil element and the infinite soil element? And if I only model 2 infinite soil element (let say along x-axis), what would be the boundary condition of the finite soil element along z-axis? Thank you!

Hello, if I want to simulate soil structure interaction, the infinite elements don't need to be set up on the top and bottom of the model? Only the lateral sides need to be set up?

HI Mr Sadeghi.Thanks for your great video.I have tried the procedure exactly and could generate infinite elements properly but I got following error in pre-process step and I do not know how to eliminate that.I appreciate any help. THE FACE S5 IS NOT VALID FOR THE UNDERLYING ELEMENT 8159 INSTANCE soil nnn-1 IN *SURFACE ASSEMBLY_soil nnn-1_SURF-LAYER3-INF

Great video, thank you so much.

@rishikkeshari6306

2 жыл бұрын

*Element, type= search this in input file

@rishikkeshari6306

2 жыл бұрын

CIN3D8

@rishikkeshari6306

2 жыл бұрын

CINAX4

can we make seismic velocity modeling using ABAQUS??????

Can YOU help me SIR ? For solid pipe(C3D8R element) how to assign infinite elements to a solid pipe?

is it possible to create infinite element in Abaqus explicit? if possible, how can we model? i am modelling liquid storage tank with soil structure interaction.

Can I use infinite element in thermal only analysis ?

Thank you for the video. It is possible to modify in the input file the element type because the AC3D8 have the same number of nodes as the CIN3D8. what if i want to use the quadratic infinite elements CIN3D12R or CIN3D18R? and does the thickness of the infinite media have influence on the damping?

@ehsansadeghi4486

7 жыл бұрын

what you want to try is somehow double precision in results. personally i haven't tried to that in a project because 8 node elements seemed to be satisfactory, but from technical coding point of view it is possible. try it. the method that i have introduced is some kind of trick.

@ehsansadeghi4486

7 жыл бұрын

an about thickness! i can say no, unless you make your boundaries suitable enough for damping. the overall prospect is having high aspect ratio in infinite element

NO BULK MODULUS IS DEFINED FOR ACOUSTIC ELEMENT'' i get this error when I try to analyze my problem, and I check inp file AC3D8 elements are come back even I change them like you did in video, is there a solution for this?

Thank you for this video! I want to study a soil-structure interaction during an earthquake, I think that Infinite elements are a good tool for this purpuse! About the boundary conditions, should I assign only an acceleration to the bottom of the model? Should I assign any BCs to Infinite elements? If the soil is non-linear, how infinte element behave? Thank you =)

@ehsansadeghi4486

7 жыл бұрын

Hi, I would recommend you to read fundamentals of FEM before using any FE Solver. Infinite Elements are working as a boundary conditions (roughly speaking) and is not needed to assign other Bfs to constraint the nodes. Acceleration should be assigned to solid bed, i.e bottom of the soil medium. This acceleration should be evolved till surface of the soil. Be careful about using the correlated acceleration data. Should you have any further questions, don't hesitate write in comments.

@stefanodalerci6149

7 жыл бұрын

Ehsan Sadeghi thank you!

@noorsharari7700

5 жыл бұрын

@@stefanodalerci6149 please did you use CIN3D8 element? I have question about it

Thanks for sharing this. Its a nice trick to create Infinite Elements without getting it complicated. However, I have a doubt in the this example you created. At time 4:10 min (of the video): You seeded the infinite part by number to be 1 element, in the direction of sweep. At 6:14 min: After meshing, only one side had single element seeding, where as the other three boundary sides did not. Till the end of the video I found the same mesh. Can you please clarify this.

@ehsansadeghi4486

9 жыл бұрын

ABHIJEET Swain this is just a sample. theoretically infinite elements act as boundaries. so you do not need to mesh them finely. one elements is satisfactory. if you mesh these boundaries finely you may not have zero displacement at the edges( try i guess it so). generally speaking, you'd better to mesh with just one element (i did with one edge you can do with others). hope it could be helpful

@bluuu1331

9 жыл бұрын

Ehsan Sadeghi : Thank You :)

dear ehsan I do a same work for 2D infinite element but when i input the inp file, i faced with an error: "The model "Job-1" has been created. AbaqusException: in keyword *ELEMENT, file "Job-1.inp", line 229: Element type "CIN2D4" is not supported. This occurred while parsing the input file. Run the input file through the batch pre-processor to check for syntax errors. The model "Job-1" has been imported from an input file. " please help me thenk you

@thekeonjhariatokaa7609

3 жыл бұрын

Did you resolve your problem?

when i start analysis this massage come NO BULK MODULUS IS DEFINED FOR ACOUSTIC ELEMENT 5313 INSTANCE soil base how can i solve these problem

@daniloper1

5 жыл бұрын

I'm facing the same problem

@mahmoudbatata

5 жыл бұрын

@@daniloper1 i solve these problem in defining material go to other bulk modulus bulk modules K = E/3(1-2v)

@daniloper1

5 жыл бұрын

thank you for your help. Saddly, I didn't make this thing work. I define two kinds of materials, one for the finite elements (without bulk modulus) and other for the infinite elements (only with bulk modulus and density,). So, I followed the tutorial and this new error appeared: AN ACOUSTIC MEDIUM IS DEFINED FOR ELEMENT INSTANCE ONLY ACOUSTIC ELEMENTS MAY HAVE THIS MATERIAL PROPERTY. Do you know something about this?

@augustocesar9286

5 жыл бұрын

​@@daniloper1 Are you using CIN3D8? this element is not acoustic

با عرض سلام، خیلی ببخشید جناب مهندس من مشکلی که در مش بندی زیاد بر می خورم ولی نتوانستم برطرف کنم، سه تپه مثلثی شکل دارم که از نوع free و Quad با سایز مش مثلا ۱۰ یا ۸ مش زدم و وریفای میکنم مشکلی نیست ولی بعد از اعمال المان بینهایت(اصلاح فایل inp به cinpe4 و ایمپورت ) اندازه های مش کم و زیاد میشه، چرا؟ و بعدش تحلیل دینامیکی خطا(مربوط به نامناسب بودن مش) میده!! چه باید کرد؟ پارتیشن بندی میکنم و سایز مش ریزتر میدهم باز خطا میده!! ممنونم راهنمایی بفرمائید

Thank you for the video sir.. I am trying to create infinite elements for a layered structure with different geometry but unable to do so. Can you please provide some help?

@ehsansadeghi4486

7 жыл бұрын

Hi thanks for your message. You'd better to follow the instructions in the video and you will be able to create your infinite elements.

@vidhi2905

7 жыл бұрын

I have tried this sir but the since the geometry is different it's not coming on all sides. I'll share the details of the section if you provide me with your email id. My id is vidhivyas.29@gmail.com Thank You

@ehsansadeghi4486

7 жыл бұрын

it is ok. email me: e-sadeghi@hotmail.com

@ehsansadeghi4486

7 жыл бұрын

sene me email e-sadeghi@hotmail.com

@vidhi2905

7 жыл бұрын

Thank you for the help sir.

dear ehsan, what will happen to waves striking at any corner? will they reflect ??

@ehsansadeghi4486

7 жыл бұрын

no they will be absorbed! which is the effect of infinite elements!

@rajeev7774

7 жыл бұрын

i mean corner of finite domain as there are no infinite elements diagonally..

@ehsansadeghi4486

7 жыл бұрын

because we have defined infinite elements in horizontal axis, consequently x-component of wave will be damped. If damping in y-direction can not be ignored . you must define infinite elements in x-y direction.

@rajeev7774

7 жыл бұрын

thank you very much

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DEAR EHSAN IS THIS METHOD CAN BE APPLIED ON 2D DIMENSION

@ehsansadeghi4486

8 жыл бұрын

+Harith Basim Yes of course

I D ONT FINE THE OUT PUTE FILE I CANT CHANGE ELEMENT

@Ehsan Sadeghi This user uploaded your video- kzread.info/dash/bejne/k6emm8iGaM6wfqg.html