摘要
提出了一种基于残余力向量进行结构损伤识别的两步法。通过计算各单元体的损伤定位标准(DLAC)值来判定可能出现损伤的单元;采用刚度联系向量来代表单元体,使计算DLAC值简单,且计算量小。利用最佳逼近向量法来精确定位并计算损伤程度。为使该方法更具实用价值,将最佳逼近向量法从单个损伤推广至多个损伤的情况。算例表明,此方法仅需一阶模态参数便可有效进行损伤识别,因而合理可靠、精度高。
A two-step method based on residual force vector is presented for structural damage identification. Firstly, the damage location assurance criterion (DLAC) values of each element are calculated to preliminarily estimate the damage elements. The introduction of the stiffness connectivity vector to represent the element makes it very simple to calculate the DLAC values. Secondly, the best achievable vector method is used to locate and evaluate the damage more accurately. For purpose of engineering applications, the best achievable vector method is extended to deal with the case of multiple damages. An illustrative example is given to verify the proposed two-step method. The identification results show that the present method is very effective.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第4期1-4,共4页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家自然科学基金资助项目(10102023)
广东省自然科学基金资助项目(031588
001180)
广东省科技计划资助项目(2002C32405)
高等学校优秀青年教师教学科研奖励计划资助项目
中山大学高等学术研究中心(香港)基金资助项目(03M4)
关键词
损伤识别
残余力向量
两步法
damage identification
residual force vector
two-step method
