水下工程结构的损伤诊断分析

DAMAGE DIAGNOSIS ANALYSIS OF UNDERWATER ENGINEERING STRUCTURE

主要通过动力有限元对结构损伤前后的动力特性进行分析,从而实现对水下结构的损伤进行诊断。采用结构损伤前后的固有频率的变化对结构是否损伤进行判定,采用结构的动力响应对结构的损伤程度进行判定,采用结构的单元模态应变能对结构的损伤位置进行判定。并以某一水下作业结构为研究对象,用ANSYS软件对其损伤进行模拟诊断分析。

This papr studies on damage diagnosis of undrwater structures using dynamic characteristic changes of a prototype structure and a damage structure.We can judge if damages of the structure happen by changes of its natural frequencies before and after damage.We can estimate the damage extent by changes of its linear dynamical response and the location of the damage by changes of its element modal strain ratio energy.Using the ANSYS software,the article indicates the numerical simulation analysis of the prototype structure and the damage structure.