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基于模态滤波器概念提出了对载荷识别模态模型法的原理性校正方案 ,构造了动载荷识别的离散模态滤波器模型。以其他点激励代替常常不可达的实际工作输入点 ,通过建立系统的模态参数并相继在模态和物理坐标下的求解对动态载荷作出估算 ,可以避免经典模态模型法通常对结构或边界条件所作的修改和由于模态参数自身误差而导致的较大识别误差 ,实例分析表明该模型识别精度较高并具有普遍的工程适用性。
Based on the modal filter concept, the principle correction scheme of load identification modal model method is proposed and the discrete modal filter model of dynamic load identification is constructed. Replacing the input points that are often unreachable by other points and estimating the dynamic load by establishing the modal parameters of the system and successively solving them in the modal and physical coordinates can avoid the problem that the classical modal model method usually applies to the structure or the boundary Conditions and the large error caused by the errors of the modal parameters. The case study shows that the model has high recognition accuracy and universal applicability.