环形钢丝绳隔振器动态特性建模与参数识别

摘要

A circular wire-cable vibration isolator was designed by adopting independent wire rope loops as elastic damping elements.Owing to its unique structure,the isolator exhibited nonlinear elastic stiffness and dynamic behavior of asymmetric hysteresis in its tension compression mode.In the present study,a modified normalized Bouc-Wen model was proposed to describe the hysteretic behaviour of a circular wire-cable vibration isolator.A two-stage identification method was developed for identifying its modal parameters.Periodic loading tests were conducted to validate the proposed model and identification method.The results showed that the proposed model and identification method are effective for accurate description of asymmetric hysteretic dynamic behavior in the tension compression mode of circular wire-cable vibration isolator.The results laid a foundation for dynamic design method of circular wire-cable vibration isolators.%设计一种采用独立钢丝绳圈作为弹性阻尼元件的环形钢丝绳隔振器。由于其结构的独特性，该隔振器具有非线性弹性刚度和垂向非对称迟滞动态特性。针对该特性，提出一种改进的归一化Bouc－Wen模型，采用分阶段识别方法进行参数辨识研究，并对提出的模型和参数识别方法进行周期性加载试验验证。结果表明：本文所提出模型以及参数识别方法对于该隔振器垂向非对称迟滞动态特性描述是非常准确有效的，为该隔振器动态设计方法奠定了基础。