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adina - eigenvalue problem
i am doing an linearized buckling analysis using adina for a column-type structure. for the same model of the structure, with the same load, i am do two analysis. in the first analysis i ask two modes and 15 modes in the second. the results are different.
my question is what is the resason of this difference?
you need to explain some more. were modes 1 and 2 not the same in both? they should be. beyond mode 2 you've got nothing to compare to.
does your software allow a shift? this could be different between your two models. it's really hard to say without seeing the model.
please post some more info and i'll try and help some more. (if i remember, my forgetter is working pretty good.)

2009-09-07, 10:16 AM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	adina - eigenvalue problem adina - eigenvalue problem i am doing an linearized buckling analysis using adina for a column-type structure. for the same model of the structure, with the same load, i am do two analysis. in the first analysis i ask two modes and 15 modes in the second. the results are different. my question is what is the resason of this difference? you need to explain some more. were modes 1 and 2 not the same in both? they should be. beyond mode 2 you've got nothing to compare to. does your software allow a shift? this could be different between your two models. it's really hard to say without seeing the model. please post some more info and i'll try and help some more. (if i remember, my forgetter is working pretty good.) __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]