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hello to all my previous question solved. another questiojn: how we can input distributed uniform load on the surface of the plate with unit of N/(m^2)??? i think eleload is not a suitable command. what command we should use to define uniform distributed load for static analysis(for the plate and sh...

hello thanks a lot vesna i understood that but what about nodes for defining springs. for defining springs i shoud define zerolengthelements. in my plate, instead of support, 4 springs exist in the buttom of the plate. block2d or block3d define nodes for plate or shell but what about 4 nodes with sa...

thanks vesna
i got it.

thanks a lot vesna

hello to all suppose we want define a plate and mesh that.in the block2d command should we define coordinates of node 1 to 4 for the 4 nodes of the plate? i mean that, should i enter the coordinates of the 4 node of the plate in the node 1 to 4 in the block2d? another question:i want to define a pla...

hello to all i wrote a code. in this code i wanted get the maximum displacement of a beam on the two simple supported in the explosion load. also the natural frequencies of the beam. i devided the beam into the 4 elements by elasticbeamcolumn element.analysis is elastic performed. but when i run the...

thanks a lot why this strong software can not solve this problem exactly?? even i discretize this beam to very node, i can not assign these nodes rotational masses. in the real, rotational masses exist. question: what about a shell or plate defined with block2d and elasticmembraneplatesection? shoul...

we know that in the eigenvalue problem, opensees needs mass matrix and stiffness matrix . also we know that we can define masses in the opensees only in nodal masses for a one beam with distributed mass, assuming nodal mass can cause large errors for determining natural frequencies. now my question ...