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Distribute the mass on nodes using LS-Dyna

Hi,

How to spread the mass on nodes using LS-Dyna (i.e, each node is having different mass)? If we select a component to add a mass then each node is having same mass but I need different masses to be added on each node. Could anyone please help on this.

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tinh

-select nodes on panel 'masses', enter mass value and create mass elems

if you already created masses on component, enter update subpanel to update mass value of different-mass areas

Suresh J

Hi,

Thanks for your reply.

If I follow the above method, I will get equal mass on all nodes. Even though I update the mass in a particular area, the nodes whichever come under the area will be having equal mass. For ex. If 1000's of nodes are there, I need 1000 different masses need to be updated automatically on all nodes. I think Primer might have this option but I need it to be done using Hypermesh.

Altair Forum User

Hi Suresh,

In such case you have to automate by writing a script.

Suresh J

Sorry Prakash, I didn't get your point.

tinh

Sorry Prakash, I didn't get your point.

You can do it in hypermesh simply by a tcl macro, example

foreach nodeid $selected_nodes mass_value $mass_map {

*createmark nodes 1 $nodeid

*masselement 1 $mass_value '' 0

}

Suresh J

Thanks Tinh,

I'll try it.