基于固定界面子结构模态的频响函数精确综合法  

Exact frequency-response-function synthesis method using interface-fixed substructure modes

作　　者：应祖光[1] 叶淑琴[1] 金林[2] 

机构地区：[1]浙江大学航空航天学院力学系,杭州310027 [2]中国科学院上海应用物理研究所,上海201800

出　　处：《振动与冲击》2010年第3期132-133,共2页Journal of Vibration and Shock

基　　金：浙江省自然科学基金资助项目(Y607087)

摘　　要：提出基于固定界面子结构模态的双协调结构频响函数精确综合方法。首先用固定界面子结构的中高阶模态与精确剩余约束模态表达子结构频域位移;再利用界面力与位移的协调关系进一步消去界面自由度,建立双协调的精确缩聚变换;然后根据里兹法,得到结构精确综合的频域运动方程与频响函数;最后通过数值结果验证该方法的综合能力与准确性。An exact frequency-response-function synthesis method considering the continuity of interface displacements and forces was proposed by using interface-fixed substructure modes.Substructural displacements in frequency domain were expressed by the mid/high-order modes and exact residual constraint modes of the interface-fixed substructures,while the lower-order mode components were eliminated by use of the relations in the dynamic equation.Then the interfacial degrees of freedom were further eliminated based on the continuity of interface displacements and forces,and an exact reduction transformation was performed.The exact synthesis equation of motion in frequency domain and frequency-response functions for structural vibration were obtained according to the Ritz procedure.The synthesis capacity and accuracy of the proposed method were verified by using numerical results regarding frequency-response functions.

关 键 词：结构振动 频响函数 固定界面子结构 精确综合法 

分 类 号：O327[理学—一般力学与力学基础] V414[理学—力学]