循环泵隔振对回路系统冲击响应的影响

Influence of pump isolation mounts on the shock response of the loop systems

为了深入研究船用设备循环泵的隔振和抗冲击性能,利用有限元方法建立了含循环泵隔振器的回路系统的动力学模型。分别计算了有无隔振情况下循环泵的模态,分析了隔振器参数对隔振性能的影响。发现隔振器刚度越小,隔振效果越好,增加隔振器阻尼能在共振区减小共振峰。循环泵隔振对循环泵和回路系统冲击响应的影响研究表明,循环泵隔振系统具有良好的抗冲击性能,隔振器降低了回路系统的响应加速度。在现有的管道布置下,加入隔振器以后,在垂直冲击载荷作用下回路系统的应力响应增大,但仍能满足美国机械工程师学会(ASME)规范的要求。

The effect of shock resistance and isolation mounts on marine pumps and the loop was modeled using the finite element method. The modes of pump with and without the isolators were computed, respectively. Increases in the stiffness of the isolation mounts increased the isolation with the isolator＇s damping reducing the resonance hump in the system. The results of the influence of isolation on the shock response of the pump and flow loop show that the pump isolation improved the shock resistance and reduced accelerations of the loop components. The stresses of the system with the isolators meet the requirements of the American Societg of Mechanical Engineers （ASME） code.