弹性元件耦合隔振系统冲击响应特性研究

Shock response characteristics of vibration isolation system with multiple coupling elastic components

  • 摘要:
    目的 针对舰船设备隔振系统抗冲击需求,研究多种弹性元器件耦合隔振系统冲击响应特性。
    方法 首先,建立考虑隔振器、限位器和外接柔性管道等弹性元件耦合隔振系统物理模型,采用有限元方法研究弹性元件耦合隔振系统冲击响应特性,并开展隔振系统冲击试验,验证有限元仿真模型的可靠性。在此基础上,分析弹性元器件刚度对其冲击响应特性的影响规律。
    结果 结果表明,弹性元件耦合隔振系统冲击响应特性有限元仿真计算结果与冲击试验测试结果吻合较好,验证了有限元仿真模型的可靠性。
    结论 弹性元件冲击刚度增大使隔振系统位移响应降低,同时加速度幅值随之升高,弹性元件耦合对设备抗冲击性能具有调节作用,研究结果可为舰船设备冲击防护设计提供指导意见。

     

    Abstract:
    Objective In view of the shock resistance performance of the vibration isolation system of warship equipment, the shock response of vibration isolation system with multiple coupling elastic components is investigated.
    Methods First, a physical model of vibration isolation system with multiple coupling elastic components constituted of vibration isolator and limiter as well as external flexible pipeline is established. The impact dynamic response characteristics of vibration isolation system is studied by using the finite element method. In addition, the impact test of the vibration isolation system were carried out to verify the finite element model.Finally, the influences of the stiffness of elastic components on the impact response characteristics are performed.
    Results Numerical results of the shock responses of elastic isolation system are consistent with the impact test results, which verifies the feasibility of the simulation method of elastic isolation system. With the introduction of flexible pipes, the total vertical stiffness of the vibration isolation system increases, the displacement response of vibration isolation system reduces and the acceleration response increases.
    Conclusions With the increase of the nonlinear stiffness of the elastic element, the displacement response of the vibration isolation system decreases and the acceleration amplitude increases. The nonlinear stiffness of elastic components can regulate the impact resistance of the equipment, which provides guidance for the impact protection design of ship structural equipment.

     

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