计算力学学报2025，Vol.42Issue(5)：722-728,7.DOI:10.7511/jslx20240618001
考虑拉索损伤的索-梁组合结构面内自由振动分析
In plane free vibration analysis of cable-beam composite structure with cable damage
摘要
Abstract
In order to investigate the effect of cable damage on in-plane free vibration characteristics of cable-beam composite structures,three dimensionless parameters of cable damage intensity,extent and position are introduced in this paper to establish an in-plane dynamic model of single-cable cantilever beam composite structures with cable damage.The eigenvalue problem of in-plane free vibration of a single cable-cantilever beam model is solved by the method of separation of variables.At the same time,the finite element models under undamaged and damaged conditions of the cable are established for verification,and the results are in good agreement with the theoretical results.The results show that the frequency of the combined structure will decrease obviously only when the sag or damage intensity and extent of the cable are large.When the damage intensity and extent of the cable increase to a certain value,1∶1 in-mode resonance phenomena tend to appear for high order frequencies.The asymmetric initial configuration caused by damage can increase the frequency of the combined structure,and some mixed modes of the combined structure change to local modes,while some local modes change to mixed modes.关键词
索梁组合结构/拉索损伤/结构动力学/自由振动/内共振Key words
cable-beam composite structure/cable damage/structural dynamics/free vibration/internal resonance分类
力学引用本文复制引用
吴俊谕,丛云跃,康厚军,郭铁丁,苏潇阳..考虑拉索损伤的索-梁组合结构面内自由振动分析[J].计算力学学报,2025,42(5):722-728,7.基金项目
国家自然科学基金(12202109 （）
12372006 （）
12372007) （）
广西科技基地与人才专项-青年创新人才科研专项(桂科AD22035930)资助项目. （桂科AD22035930）
