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.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
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)
关键词
复杂结构
风抖振
虚拟激励法
随机振动
门式起重机
Complex structure
Wind buffeting
Pseudo excitation method
Stationary random vibration
