基于子结构模型的平置式浮筏隔振系统功率流传递特性分析  

Power Flow Transfer Characteristics Analysis of Vibration Isolation Systems of Flat Floating Rafts Based on Substructure Model

作　　者：门丽洁 余桐奎 龙军 刘文帅 王志伟 时胜国[2] MEN Lijie;YU Tongkui;LONG Jun;LIU Wenshuai;WANG Zhiwei;SHI Shengguo(Dalian Scientific Test and Control Technology Institute,Dalian 116013,Liaoning,China;School of Underwater Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]大连测控技术研究所,辽宁大连116013 [2]哈尔滨工程大学水声工程学院,哈尔滨150001

出　　处：《噪声与振动控制》2021年第2期241-247,共7页Noise and Vibration Control

摘　　要：针对大型船用浮筏隔振系统的声学优化设计问题,从振动能量传递角度出发,研究浮筏隔振系统各子结构参数变化对系统隔振性能的影响,分析振动能量由设备机脚经浮筏隔振系统传至基础的传递规律。采用子结构导纳综合法,建立基于弹性基础的多激励源多自由度浮筏隔振系统动力学模型,通过仿真分析不同子结构参数条件下浮筏系统振动功率流传递特性和变化规律。仿真结果表明:平置式浮筏系统中隔振器刚度、机组和筏体质量、弹性基础板厚度等结构参数对传入基础的功率流影响较大,减小隔振器刚度、增加机组设备、增加筏体质量、增大基础板厚度均可有效降低传入基础的振动能量。The acoustic optimizing design of vibration isolation systems of flat floating rafts of large scale ships was studied.From the viewpoint of vibration energy transfer,the influence of substructure’s parameter of the floating raft on vibration isolation of the system was investigated.The transfer law of vibration energy from equipment seat to foundation through the floating raft was analyzed.Using substructure mobility synthesis method,the multi-excitation source and multi-DOF dynamics model of the vibration isolation floating raft system on the elastic foundation was built.The vibration power flow transfer characteristics of the floating raft system for different structure parameters were simulated and the influence of the substructure parameters on the vibration isolation system was analyzed.Results show that the parameters of the vibration isolation flat floating raft system,such as stiffness of isolator,mass of equipment and floating raft,thickness of elastic foundation plate etc.,have great influence on the power flow transferring into the foundation plate.And some corresponding measures,such as decreasing the stiffness of isolators,increasing the mass of equipment or floating raft,and increasing the thickness of elastic foundation plate,are effective to reduce the vibration energy transferring into the foundation plate.

关 键 词：振动与波 功率流 子结构导纳 传递特性 模型 浮筏 

分 类 号：TB532[理学—物理]