土木工程建筑结构损伤精确诊断方法仿真

Simulation of Precise Diagnosis Method for Civil Engineering Structural Damage

为了提高土木工程建筑结构的安全系数,需要对土木工程建筑结构中的损伤进行诊断。采用当前建筑结构损伤诊断方法对土木工程建筑结构中的损伤进行诊断时,得到的土木工程建筑结构灵敏度系数准确性低、诊断结果精准度较低。提出一种土木工程建筑结构损伤精确诊断方法,在土木工程建筑结构特征方程的基础上构建土木工程建筑结构的刚度矩阵,通过刚度矩阵计算结构的频率和振型灵敏度系数,根据计算结果对土木工程建筑结构的灵敏度进行分析。采用基于相对小波总能量变化的损伤识别方法计算损伤前后测点处小波能量的总变换,根据总能量变换对土木工程建筑结构的损伤进行识别,完成土木工程建筑损伤的精确诊断。仿真结果表明,所提方得到的土木工程建筑结构灵敏度系数准确性高、诊断结果精准度高。

In order to improve the safety factor of civil engineering building structure, a method to accurately diagnose damage in civil engineering building structures was proposed. On the basis of feature equations of civil engineering building structure, the stiffness matrix of civil engineering building structure was constructed. Then, the stiffness matrix was used to calculate the frequency of structure and the sensitivity coefficient of vibration mode. According to the calculation result, the sensitivity of civil engineering building structure was analyzed. Moreover, the damage identification method based on total energy change of relative wavelet was used to calculate the total transformation of wavelet energy at measurement point before and after the damage. Finally, the damage of civil engineering building structure was identified based on the total energy transformation. Thus, we completed the accurate diagnosis of damage of civil engineering construction. Simulation results prove that the accuracy of sensitivity coefficient of civil engineering building structure obtained by the proposed method is high. Meanwhile, the diagnostic accuracy is high.