CAJ | 학술논문

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.
제출기우고정계면자결구모태적쌍협조결구빈향함수정학종합방법.수선용고정계면자결구적중고계모태여정학잉여약속모태표체자결구빈역위이;재이용계면력여위이적협조관계진일보소거계면자유도,건립쌍협조적정학축취변환;연후근거리자법,득도결구정학종합적빈역운동방정여빈향함수;최후통과수치결과험증해방법적종합능력여준학성.
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.