【摘要】 基于小波核函数最小二乘支持向量机方法(WK-LS-SVM)的研究成果,对WK-LS-SVM方法的抗噪声能力和适用性进行了分析。对10层框架结构的25种损伤工况进行了数值模拟,结果表明WK-LS-SVM方法具有良好的抗噪声能力。对不同结构相同损伤等级的自振频率进行分析,发现两者的自振频率变化率具有相似性,因此用某结构参数训练的支持向量机识别结构参数与之差异不大的结构的损伤情况,其识别误差小。因此实际工程中用简化估计的结构参数来识别损伤能满足工程精度要求。更多还原

【Abstract】 Based on the achievement in research on wavelet kernel funclion-least square-support vector machine(WK-LS-SVM) method,the anti-noise capability and adaptability of the method were analyzed.In this paper,25 typical damage conditions in a ten-storey frame structure were simulated.The results show that WK-LS SVM has a good anti-noise capacity.Further,the natural frequencies of different structures with same damage level were examined.The similarity of the change rate of natural frequencies was discovered.It shows that using supported vector machine trained with certain structural parameters to identify the damage level of similar structures is feasible and the induced error is small.Hence,identifying damage level of structure with simplified structure parameter estimation in practical engineering can satisfy engineering accuracy demand.更多还原