%0 Journal Article
%T INFLUENCE OF SMALL CHANGES OF SUPPORT LOCATION ON VIBRATION MODE SHAPES<br>约束位置的修改对振动模态的影响
%A Hu Haichang
%A Liu Zhongsheng
%A Wang Dajun
%A <br>胡海昌
%A 刘中生
%J 力学学报
%D 1996
%I 
%X It is of importance to study the influence of small changes of support location on vibration mode shapes because of its necessary role in structural optimization and model correction using the generalized variational principle, the first-order purturbation equations of vibration eigenproblem are derived. In order to solve these equations two difficulties are dealt with, one is associated with the incompleteness of the unperturbed eigenfunctions, the other the truncation of the higher modes. A hybrid expansion method, "modal expansion power series", is presented to solve the perturbed equations, with the advantage of fast convergence and being easy to estimate its convergence.
%K change of support location
%K modal sensitivity
%K modal truncation
%K boundary value problem<br>约束位置修改，模态敏度，模态截尾，边界值问题
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=4100DA4A1A3BA1B0CE5AD99AE1DFB420&aid=A19AAE9267BC9EBA89D49433055DD767&yid=8A15F8B0AA0E5323&vid=D3E34374A0D77D7F&iid=CA4FD0336C81A37A&sid=EA389574707BDED3&eid=9971A5E270697F23&journal_id=0459-1879&journal_name=力学学报&referenced_num=3&reference_num=5