how to add a preload of spring in Ansys workbench ls-dyna?

pengchengyinpengchengyin binghamton universityMember

Hi all, 

Recently, I am using workbench ls-dyna to simulation the drop test of a rack server. But I so confused about how to add a preload of spring in workbench ls-dyna. When I try to add the preload of spring at the setting of spring, the same as the image shows at below. it doesn't work.  I want to ask, does anybody know how to add preload of spring in workbench ls-dyna?

Thank you.

 

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