周期桁架浮筏系统的隔振特性研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (2) : 115-118,.

论文

周期桁架浮筏系统的隔振特性研究

况成玉; 张志谊; 华宏星

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Analysis on vibration isolation characteristics of a floating raft system constructed with periodic truss structures

KUANG Cheng-yu; ZHANG Zhi-yi; HUA Hong-xing

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摘要

研究了周期结构对桁架浮筏隔振系统振动传递的衰减特性，首先利用有限元方法计算周期桁架浮筏的频响特性，并将其与传统浮筏进行比较。然后，为在隔振系统中评价周期结构浮筏的性能，运用频响函数综合法建立整个系统的振动传递模型，计算频响函数。仿真分析表明：周期桁架浮筏较传统浮筏更有效地抑制振动的传递，当与设备组成一个隔振系统之后，在与浮筏上下层隔振器的共同作用下，整个隔振系统能在一个宽频段内对振动传递产生更好的抑制作用

Abstract

Vibration characteristics of a floating raft system constructed with periodic truss structures are analyzed. First, frequency response functions of the new floating raft system are calculated by means of the finite element method and compared with those of the traditional floating raft system. And then, to find out the effect of the periodic truss raft system in reducing vibration transmission, the FRF-based substructure method is utilized to establish the model of an assembled system involving the periodic truss raft, a base structure and equipment. Simulation results indicate that the floating raft with periodic truss structures has a better performance in suppressing vibration transmission than the traditional floating raft. When the new rafting system is applied to isolate machinery vibration along with vibration isolators, the entire isolation system can better reduce vibration transmission in a wide frequency band.

导出引用

况成玉;张志谊;华宏星. 周期桁架浮筏系统的隔振特性研究[J]. 振动与冲击, 2012, 31(2): 115-118,

KUANG Cheng-yu;ZHANG Zhi-yi;HUA Hong-xing. Analysis on vibration isolation characteristics of a floating raft system constructed with periodic truss structures[J]. Journal of Vibration and Shock, 2012, 31(2): 115-118,