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发表时间：2004-01-01

发表刊物：振动工程学报

所属单位：运载工程与力学学部

期号：4

页面范围：427-432

ISSN号：1004-4523

摘要：This paper focuses on the nonlinear dynamic systems which have ill-conditioned stiffness matrix. Because some higher accurate methods are out of work in these problems, a method which can eliminate the ill-condition and singularity through a equivalence transformation is proposed. After changing the original dynamic system to general nonlinear system by Hamilton criterion, a satisfactory numerical solutions for a rotor system with multi degrees of freedom supports contained nonlinear fluid film bearings by segmented-direct-integration algorithm are obtained. Also, it can deal with general stiffness problems effectively.

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