复杂结构的风激随机振动分析  

WIND-EXCITED RANDOM VIBRATION OF COMPLEX STRUCTURES

作　　者：孙东科[1] 林家浩[1] 张亚辉[1] 张春宇[1] 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,大连116023

出　　处：《机械工程学报》2001年第3期55-58,61,共5页Journal of Mechanical Engineering

基　　金：国家自然科学基金(10072015);国家重点基础研究专项经费(G1999032805)

摘　　要：将随机振动虚拟激励法引入风工程，用于求解大型复杂结构抖振响应。计算自动包含了激励之间的非完全相关性、振型之间耦合项的贡献，并且保持了高效、快捷的特点。特别适合于实际工程应用。以一座大型门式起重机的抖振响应为例，分析了风激励振动对操作平顺性的影响。The pseudo excitation method (PEM) is extended to the analysis of wind-excited random vibration (buffeting) of complex structures. The partial correlation between wind-excitations and the cross-correlation terms between the participant modes have all been involved in the computations. The proposed method is not only accurate, but also very efficient, e. g. structures with thousands of degrees Of freedom can be computed very quickly on ordinary personal computers. A large shipyard crane is taken as a case study of the method.

关 键 词：复杂结构 风抖振 虚拟激励法 随机振动 门式起重机 

分 类 号：TH213.5[机械工程—机械制造及自动化] TB123[理学—工程力学]