液压限位隔离系统的抗冲击性能研究

在舰载隔离系统中安装限位器可有效限制设备的最大相对位移，但传统橡胶限位器易对系统产生严重的二次冲击。首先，建立了液压限位器的数学模型，并通过杜哈梅积分法对隔离系统的冲击响应特性进行了仿真分析;然后，设计了带液压限位器的隔离系统试验装置并进行了冲击测试试验，比较了不同限位器参数对抗冲击效果的影响;最后，对比分析了液压限位与橡胶限位隔离系统的冲击响应特性，与无限位的隔离系统相比，液压限位可减小近60%的最大相对位移响应,存在一个最佳节流孔孔径，可使系统获得最佳隔振效果。研究结果表明：与传统橡胶限位隔离系统相比，在相对位移响应近似相等的条件下，加速度响应可降低44.5%，大幅提高舰载设备的抗冲击性能。

Shock Resistance of Vibration Isolation System with Hydraulic Displacement

The maximum relative displacement of shipboard equipment can be effectively limited when a limiter is installed in vibration isolation system. However, traditional rubber limiter is liable to produce serious secondary shock on the system. Firstly, the mathematical model of hydraulic limiter is established and the shock response characteristics are simulated and analyzed by Duhamei integral method. Secondly, the test devices of vibration isolation system with hydraulic limiter are designed and the effects on shock resistance with different limiter parameters are studied by the actual shock test. Finally, the shock response characteristics of vibration isolation system with both hydraulic and rubber limiter are compared and analyzed. The results show that: compared with non-limiter vibration isolation system, the hydraulic limiter can reduce the maximum relative displacement response by 60%; there is an optimum throttle aperture, which can make the system obtain the optimum vibration isolation effect; compared with rubber limiter vibration isolation system, the hydraulic limiter can reduce acceleration response by 44.5% when the relative displacement response is approximate equal. Therefore, hydraulic limiter can substantially improve the shock resistance of shipboard equipment.