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mesh free +orthogonal transform method +free vibration

Submitted by arz83 on

Hi

I want to impose SS-F-SS-F or F-F-F-F for boundary condition of rectangular plate with element free galerkin method and with

ortogonal transform method(G.R Liu and chen 2001) for imposing B.c. 

How can I do that?

for F-F-F-F how can I impose B.c? when I do nothing for imposing B.c ,I will have 3 extra natural frequency

the first complex and second and third near zero. how can I solve this problem

thanks

vielen dank

Ali