基于自适应扩展卡尔曼滤波的消能减震结构及附加阻尼力识别

Identification of a Passively-controlled Energy Dissipation Structure and Additional Damping Force Based on Adaptive Extended Kalman Filter

针对消能减震结构中阻尼器提供的阻尼力难以直接测量,对其性能及状态进行评估较为困难的问题,提出了一种基于自适应扩展卡尔曼滤波的结构参数及未知激励识别方法,并将其应用于消能减震结构的阻尼器特性识别.当阻尼器结构模型已知时,该方法可对阻尼器参数进行识别;当阻尼器结构模型未知时,阻尼器对结构提供的附加阻尼力可视为结构所受附加未知激励,同样也可由该方法进行识别.采用一个多层剪切框架结构和一个多层加装阻尼器的消能减震结构作为数值算例,并采用一个单层加装阻尼器的剪切框架结构作为试验算例,验证了所提出的方法的有效性和可行性.所提出方法可为消能减震结构中阻尼器的特性识别及性能评估提供更多的依据.

In order to solve the problems that it is difficult to directly measure the damping force provided by the damper of passive energy dissipation structure,and it is difficult to evaluate the performance and state of the damper,in this paper,a structural identification method based on adaptive extended Kalman filter is proposed and the method is applied to the damper characteristic identification of passive energy dissipation structures.Under the condition that the damper model is known,the damper parameters can be identified;under the condition that the damper model is unknown,the additional damping force provided by the damper can be considered as the unknown excitation and can also be identified by the proposed method.A multi-storey shear frame structure and a multi-storey damper controlled structure are used as numerical examples,and a single-storey damper controlled structure is used as experimental example to demonstrate the effectiveness and feasibility of the proposed method.The proposed method can provide more basis for the characteristic identification and performance evaluation of the dampers in the passive energy dissipation structure.