有损伤框架结构中的波动分析

基于回传射线矩阵法，研究了有损伤框架结构在水平方波脉冲作用下脉冲作用点的速度波，结构的局部损伤用减小受损单元的横截面面积来模拟。结果表明：改变脉冲作用点位置，通过脉冲作用点横向速度波首波波幅的变化可以确定受损单元的起始位置；当脉冲作用点在受损单元的起始位置时，脉冲作用点横向速度波首波波幅变化越大，损伤越大，脉冲作用点横向速度波的第一个波谷到达时间越晚，损伤单元越长。

Wave Analysis of Damaged Frame Structures

Based on the method of reverberation matrix, the velocity wave of a damaged frame structure at the position of square pulse application is discussed in this paper. The local damage is described by reducing the cross-sectional area of damaged elements. The study concludes that the amplitude change of head wave of transverse velocity at the position of applied impulse can determine the starting location of damaged element. The greater the amplitude change of head wave of transverse velocity is, the severer the damage is, the later the arriving time of the first wave hollow and the longer the damaged element will be.