【摘要】 基于应变模态损伤识别理论,以受损K6型单层球面网壳结构作为研究对象,通过数据对比得到较精确的受损结构模型.用折减杆件弹性模量的方式来模拟杆件损伤,利用分析软件得到初始损伤及各类有损情况下的应变模态.结果表明:该方法能够在低阶模态条件下,有效识别网壳不同位置以及低至10%,高至90%的局部损伤,适用于实际观测的条件下的网壳损伤识别.更多还原

【Abstract】 Based on the strain modal damage identification theory,this paper took damaged single-layer reticulated shells as the research object,and simulated a more precise damaged structure model by comparing the experimental data with the analysis data.The strain mode in the original state and any damaged states of the shells was obtained by using the analysis software,and reducing the rod elasticity modulus to simulate rod damage.After the analysis of damage data,the results show that the method can easily identify the damage locations of the damaged structure and 10%~90%local damage in low order modes.And the method is applicable to damage identification of damaged shells in actual conditions.更多还原