基于固定界面子结构模态的频响函数精确综合法

应祖光*;叶淑琴;金林

振动与冲击 ›› 2010, Vol. 29 ›› Issue (3) : 132-133.

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振动与冲击 ›› 2010, Vol. 29 ›› Issue (3) : 132-133.
论文

基于固定界面子结构模态的频响函数精确综合法

  • 应祖光*1;叶淑琴1;金林2
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EXACT FREQUENCY-RESPONSE-FUNCTION SYNTHESIS METHOD USING INTERFACE-FIXED SUBSTRUCTURE MODES

  • YING Zu-guang1; YE Shu-qin1; JIN Lin2
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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。

Abstract

An exact frequency-response-function synthesis method with the continuity of interface displacements and forces is proposed by using interface-fixed substructure modes. Substructural displacements in frequency domain are firstly expressed by the mid/high-order modes and exact residual constraint modes of the interface-fixed substructure, where the lower-order mode components are eliminated by the dynamic equation. Then the interfacial degrees of freedom are further eliminated based on the continuity of interface displacements and forces, and an exact reduced transformation is performed. The exact synthesis equation of motion in frequency domain and frequency-response functions for structural vibration are obtained according to the Ritz procedure. Finally, the synthesis capacity and accuracy of the proposed method are verified by using numerical results on 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

Key words

structural vibration / frequency-response function / interface-fixed substructure / exact synthesis method

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应祖光*;叶淑琴;金林. 基于固定界面子结构模态的频响函数精确综合法[J]. 振动与冲击, 2010, 29(3): 132-133
YING Zu-guang;YE Shu-qin;JIN Lin. EXACT FREQUENCY-RESPONSE-FUNCTION SYNTHESIS METHOD USING INTERFACE-FIXED SUBSTRUCTURE MODES[J]. Journal of Vibration and Shock, 2010, 29(3): 132-133
中图分类号: O327    V414   

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