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通过脉冲响应对结构故障的敏感度分析,本文提出一种由响应时间序列获得系统脉冲响应,并通过 Kalman 滤波方法对故障识别方程进行估值的诊断结构刚度故障的方法。数字仿真与悬臂梁预制裂纹的诊断试验结果说明本文提出的裂纹诊断方法是有效的,并有工程要求的精度。
By analyzing the sensitivity of impulse response to structural faults, this paper presents a method of diagnosing the stiffness of a structure by using the response time series to obtain the impulse response of the system and estimating the fault identification equation by Kalman filter. The results of numerical simulation and the test of prefabricated crack in cantilever indicate that the proposed crack diagnosis method is effective and has the required engineering accuracy.