简支梁状态判别的动力响应法

A Dynamic Response Method for Determining the State of Simply Supported Beams

利用动力响应状态特征量为状态指标来判定简支梁在移动质量荷载下的状态是否变化。以矩形截面简支梁为例，考察出现局部损伤的情况，通过对大量计算结果的分析处理，选取对应移动质量荷载的敏感状态特征量——加速度均方根值，提出了简支梁损伤判别的动力响应法——加速度均方根值法。

A dynamic response method, root mean square value of acceleration method, for determining the state of structures based on the state characteristic variables is discussed. The method is applied to determine the state of a simple supported beam which contains small local damages. It is shown by a number of calculations and analyses that the root mean square value of acceleration is a sensitive characteristic variable of the dynamic response which may be used to describe the state of a simply supported beam.