CAJ | 학술논문

为了研究隔震橡胶支座的力学特性,采用简化的Wen模型分析隔震支座的非线性动力行为,并用实验方法测试得到了该模型的力学相关参数.鉴于该模型具有高度的非线性,传统的参数识别方法不再适用,根据非线性系统状态参数估计理论,利用序贯非线性最小二乘方法估计该迟滞模型的非线性参数.该方法具有输入量少、计算精度高、易于实现的优点.通过进行两种地震波激励下的振动台实验,分析结果表明,这种简化的Wen模型能够模拟隔震支座的动态力学行为,而且应用该方法得到的隔震支座的模型参数与实际值比较一致,从而证明了该方法在橡胶隔震支座检测和健康状态评估中的有效性.
위료연구격진상효지좌적역학특성,채용간화적Wen모형분석격진지좌적비선성동역행위,병용실험방법측시득도료해모형적역학상관삼수.감우해모형구유고도적비선성,전통적삼수식별방법불재괄용,근거비선성계통상태삼수고계이론,이용서관비선성최소이승방법고계해지체모형적비선성삼수.해방법구유수입량소、계산정도고、역우실현적우점.통과진행량충지진파격려하적진동태실험,분석결과표명,저충간화적Wen모형능구모의격진지좌적동태역학행위,이차응용해방법득도적격진지좌적모형삼수여실제치비교일치,종이증명료해방법재상효격진지좌검측화건강상태평고중적유효성.
Due to the complex nature of the excitation and the inherent dynamics characteristics of restoring force of the base isolation system, the response of rubber bearings subject to strong earthquake are very complicate. Hence it is necessary to describe the restoring force and evaluate the condition of the rubber bearings while they are running. In this paper, the simplied Wen′s model is put forward for analyzing the properties of rubber bearing. Based on vibration data measured from sensors, a new data analysis method, referred to as the sequential non-linear least-square estimation (SNLSE), has been used. This approach has significant advantages over the extended Kalman filter (EKF) approach in terms of the stability and convergence of the solution as well as the computational efforts involved. The accuracy and effectiveness of the new approach has been demonstrated using a kind of rubber bearing (GZN110). This research results can not only be taken as a useful reference for the rubber bearings′ seismic designing, but also provide related theory for the rubber bearings′ health monitoring