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# Pranav Hari

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1. ## Node number for independent node of RBE2

Hi Nachiket Kadu Still i fell we can identify dependent and independent nodes using node numbers and keep them in sets. If you can share me the model, i will check and reply. Use secure file transfer link https://ftin.india.altair.com:8443/filedrop/~Ma3TaE
2. ## set up a 2d optimization of square cell that is able to achieve non linear F(s)

Hi Farper Refer below tutorial from OptiStruct Help for lattice optimization OS-T 3300
3. ## Node number for independent node of RBE2

Hi Nachiket Kadu Yes. You can use review option from 1D > Rigids panel to view the node numbers of independent as well as dependent nodes.
4. ## Frequency response analysis

Hi, It means that for X newton of force and given excitation frequency ranges, it will give you necessary response outputs It will give you results on how the system behaves under a particular load (X) with a given excitation frequencies (1000 Hz)
5. ## Frequency response analysis

Hi Mayurd67 Frequency Response Analysis is used to calculate the response of a structure subject to steady state oscillatory excitation. The loading is sinusoidal. The loads can be forces, displacements, velocity and acceleration. The response occurs at the same frequency and damping would lead to a phase shift. The outputs from a frequency response analysis are displacements, velocities, accelerations, forces, stresses and strains. The responses are usually complex numbers that are either given as magnitude and phase angle or as real and imaginary part So if X Newton's of force is applied on a structure at say 100﻿0Hz, then the system will give corresponding frequency response outputs as displacements, velocities, accelerations, forces, stresses and strains. Refer this forum post and OptiStruct tutorial OS-T 1300 also for better understanding.
6. ## Spot Weld

Hi Mahit PLINKS are link elements used in PAMCRASH. They are penalty-based, mass-less contact element with user definable linear and non linear element stiffness and strength capabilities. They are used to represent the response and failure of spot welds, riveted joints and bolts. RBE are rigid body elements used in HyperMesh. They are the most simple of 1D elements and they simply connect two or more nodes together. In the case of an RBE2, one node serves as the Independent and the other(s) the Dependant node(s). The dependent node(s) simply follow the motion of the Independent node in the Degrees of Freedom that have been linked. These elements are useful to simply represent welds or to tie together two dissimilar meshes. They are also used to transmit load across nodes/elements Hope it is clear
7. ## Number Of integration point

Hi beytut This forum post may also help you to relate integration point & hour glass. Have a look.
8. ## Better Method for Spotweld in LSDYNA ?

Hi Ashish_MEXPERT I think you can use the Mesh independent method to connect the rollers. You can see this video for better understanding.
9. ## 3d meshing a very thin region of a rod

Hi virtro The thin edges have been refined by using a fine mesh along the region. The surface was split using Geometry > surface edit > Trim with nodes and re meshed with a smaller element size Then the mid surface of the cylinder was extracted using Geometry > midsurface > extract, to do a 2D mesh For connecting 3D mesh to 2D mesh, here i used a Tie contact between the face elements of the rod and cylinder The model is attached for your reference rod_and_cylinder_editted.hm
10. ## Supporting Files Required

Hi Rahul Prakash We will check and send the file to your email.
11. ## long time response

Hi Mrt You can export the components that are not considered for analysis in to a different file and delete those from the original file. So after deleting you will be having only the components for solving.Then try solving and check Even though you have masked the unwanted components, the re-meshing may cause changes to other components/Elements also.
12. ## Viewing Loadstep Subtitle In Hyperview Window Notes

Hi Andy@LamteqSolutions Did you mean this? You can add load case title using Field names selector option from notes panel
13. ## 3d meshing a very thin region of a rod

Hi virtro This can be cleared by refining the mesh near the thin section. Try clearing the tet collapse near the thin section of the rod. Then extract mid surface of the cylinder to create a 2D mesh and connect the 3D & 2D mesh using rigid elements like RBE2s or RBE3s with a layer of face elements on solid mesh. You can refer these forum links to connect 3D mesh to 2D mesh
14. ## Viewing Loadstep Subtitle In Hyperview Window Notes

Hi Andy@LamteqSolutions You can use the notes option in HyperView to give description for your model on the screen.
15. ## spherical sph mesh

Hi Pierre-Marc François Refer this tutorial and forum post for SPH method https://altairuniversity.com/wp-content/uploads/2017/08/Bird_Strike_RP.pdf If that doesn't work share us the model file. We will have a try and check you can use secure file transfer link https://ftin.india.altair.com:8443/filedrop/~Ma3TaE&nbsp;
16. ## Creating separate components yet with a common surface without any inter-penetrations

Hi @Dakshitha Can you tell us what solver are you using?
17. ## Error jacobian

Hi Aslan Please have a check whether these forum posts can help you. https://forum.altair.com/topic/582-cquad4-element-is-distorted-zero-or-negative-jacobian/ https://forum.altair.com/topic/22212-error-message-optistruct/
18. ## How to move groups' elements from solid to shell

Hi traviresta Can u share us the model. We will try use the secure file transfer link https://ftin.india.altair.com:8443/filedrop/~Ma3TaE
19. ## Difference between Transient direct and Transient modal

Hi @Ferrari248F1AQ You can try getting an idea about Transient direct and a Transient modal analysis﻿ from Optistruct Help tutorials. Refer OS-T: 1310 Direct Transient Dynamic Analysis of a Bracket OS-T: 1315 Modal Transient Dynamic Analysis of a Bracket
20. ## *** ERROR 14: Missing property # 1 referenced by CQUAD4 # 1.

Hi Phat Vu I checked your file. This error is due to the presence of Quad4 shell elements in your model which has no defined property. Try deleting the quad4 elements using Delete > Elem > by config > quad4 and then run the analysis. The analysis has completed from my end.
21. ## Analysis/Cantrol Crad/ANTYPE/HARMIC/Procedure

Hi We have some tutorials in HyperMesh help for solver interfaces. This may help you, have a check
22. ## Analysis/Cantrol Crad/ANTYPE/HARMIC/Procedure

Hi, Hope these links can guide you Here you will get tutorials for Static, Modal, Harmonic, Transient and Random Analysis.
23. ## Analysis/Cantrol Crad/ANTYPE/HARMIC/Procedure

Hi @David Jacob You can get the all these tutorials from OptiStruct help
24. ## error 7007

Hi Refer this Forum post also to resolve Warning 1971
25. ## error 7007

Hi @Teja Hope this forum post may help you
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