考虑作动器输出约束的分散中间质量混合隔振系统建模分析  

Modeling and analysis of decentralized intermediate mass hybrid vibration isolation system considering actuator output constraints

作　　者：牛宁 刘钟 孙玲玲[1,2] Niu Ning;Liu Zhong;Sun Lingling(School of Mechanical Engineering,Shandong University,Jinan 250061,China;National Demonstration Center for Experimental Mechanical Engineering Education,Jinan 250061,China)

机构地区：[1]山东大学机械工程学院,山东济南250061 [2]机械工程国家级实验教学示范中心,山东济南250061

出　　处：《中国舰船研究》2019年第6期155-163,共9页Chinese Journal of Ship Research

基　　金：山东省自然科学基金资助项目(31360005201504)

摘　　要：[目的]研究舰船主动隔振系统的能量波动特性。[方法]首先,建立一种浮筏混合隔振系统广义数理模型,包含有多向复合扰动振源、分布参数主/被动一体式隔振器、分散中间质量及弹性安装基础,并从声振能传递与控制角度揭示系统的耦合振动机理。然后,结合工程中隔振系统的应用,设置等中间质量的浮筏隔振系统作为参照组,研究隔振器内共振、中间结构波动效应、中间质量与机器质量比以及不同作动器布置方案对系统能量传递的影响。[结果]分析结果表明:相比于传统的浮筏隔振系统,尤其是在中、高频共振区,分散中间质量隔振系统对于振动能量的隔离效果有明显的提高;对作动器施加约束降低了未施加约束时的理论预测误差。[结论]此类混合隔振系统在整个频段内具有良好的隔振效果,隔离性能超过传统隔振系统15 dB以上,且考虑作动器输出约束后更符合工程实际。[Objectives]The energy fluctuation characteristics of the ship's active vibration isolation system is studied.[Methods]Firstly,a generalized mathematical model of hybrid vibration isolation system with multi-dimensional composite perturbation vibration source,distributed parameter active-passive integrated vibration isolator,decentralized intermediate mass and elastic installation foundation was established,a nd the coupling vibration mechanism of the system was revealed from the perspective of acoustic vibration energy transmission and control.Then,c ombined with the application of the vibration isolation system in the actual project and setting the intermediate mass floating damper vibration isolation system as the reference group,the resonance in the isolator,the wave effect of the intermediate structure,the intermediate mass to machine mass ratio,a nd the effect of different actuator arrangements on the energy transfer of the system were studied.[Results]The results show that the isolation effect of decentralized intermediate mass vibration isolation system on vibration energy is significantly improved compared with floating raft vibration isolation system,e specially in the middle-high frequency resonance region,and the active control considering the actuator output constraints can effectively reduce the error of theoretical prediction made when no constraint is imposed.[Conclusions]This kind of hybrid vibration isolation system has good vibration isolation effect in the whole frequency band,a nd its isolation ability exceeds that of the traditional vibration isolation system by about 15 dB,a nd the active control considering the output constraints of actuators is more suitable for engineering practice.

关 键 词：多维隔振 分散中间质量 波动效应 振动能量 输出约束 

分 类 号：U661.44[交通运输工程—船舶及航道工程] TB53[交通运输工程—船舶与海洋工程]