Obtaining Mass and Stiffness Matrices from HyperMesh Model

Hi,

Please use PARAM, EXTOUT in control cards to write out reduced stifness and mass matrix to an external file.

EXTOUT has two formats DMIGPCH and DMIGBIN which wirtes to .pch and .dmg formats respectively.

Go to Analysis>> Control cards>> PARAM, EXTOUT (DMIGPCH) to activate the card.

This will write a reduced mass and stiffness matrices in .pch format in the working directory.

You can also try PARAM, POST, -5  will write the stiffness and mass matrices to the .k.op2 and the .m.op2 files, respectively

Hi,

where can I find this option in HyperCrash? Is there any possibility to get the nodal forces in an ASCII file?

Thanks!

Hi,

I am facing the same problem. The method for calculating the .k.op2 and .m.op2 files seems the most straightforward to me. But how can I read obtained binary files?

Thanks for you help,

Matej

You would need to open the result files (H3D/OP2) which are binary files in HV.

Regards

Rahul R

Can you please be more specific. How to view or load the mass and stiffness matrices, based on the op2 files in HV?

Greetings,

Matej

All,

This feature maybe available soon for RADIOSS solver.

how to calculate stiffness matrix of a body in HM opti

thank you

Hi Lokesh,

You can output the stiffness matrix. Please search for the same in the forum for related links. 

can we calculate the rotational stiffness in hypermesh?

I've done those steps and there's no file in working directory? why?

You would need to open the result files (H3D/OP2) which are binary files in HV.

 

Regards

Rahul R

There is any other option to export *.m.op2 / *.k.op2 as an ASCI file ?

Hi,

 

Please use PARAM, EXTOUT in control cards to write out reduced stifness and mass matrix to an external file.

 

EXTOUT has two formats DMIGPCH and DMIGBIN which wirtes to .pch and .dmg formats respectively.

 

Go to Analysis>> Control cards>> PARAM, EXTOUT (DMIGPCH) to activate the card.

 

This will write a reduced mass and stiffness matrices in .pch format in the working directory.

 

You can also try PARAM, POST, -5  will write the stiffness and mass matrices to the .k.op2 and the .m.op2 files, respectively

Hi, i tried both options but i only get the stiffness matrix, do you know why?

Hi,

 

Please use PARAM, EXTOUT in control cards to write out reduced stifness and mass matrix to an external file.

 

EXTOUT has two formats DMIGPCH and DMIGBIN which wirtes to .pch and .dmg formats respectively.

 

Go to Analysis>> Control cards>> PARAM, EXTOUT (DMIGPCH) to activate the card.

 

This will write a reduced mass and stiffness matrices in .pch format in the working directory.

 

You can also try PARAM, POST, -5  will write the stiffness and mass matrices to the .k.op2 and the .m.op2 files, respectively

Sorry, David Vásquez.

But it did not work.