连续系统动态载荷识别的时域方法

Time Domain Identification Method of Dynamical Loads on a Continuous System

本文提出连续系统动态载荷识别的一种时域方法.通过适当变换,将问题归结为求解Volterra型第一类积分方程.在一定的载荷假设条件下,用插值函数将积分方程离散化,即可获得动态载荷时间历程或分布形式的时域识别计算模式.采用数值解法进行的仿真实例及实梁试验表明,方法是有效的.

The paper offers a method of identification of dynamic loads applied to a continuous system. With a certain transformation, the differential equation of motion is changed into an integral equation related to the dynamic loads, and the problem turns to the solution of a first kind Volterra integral equation. Under certain assumptions concerning the dynamic loads, the integral equation can be discretisized with some interpolation functions and the dynamic loads can be generally identified. Some simulation examples about continuous beams and plates are presented. The results fully verify the effectiveness of the method offered.