基于有限元和功率流理论的浮筏隔振效果评价方法研究  

Research on Evaluation Method of the Floating Raft Vibration Isolation Effect Based on FEM and Power Flow Theory

作　　者：向祖权[1] 居浩 宋利飞 茅云生[1] 傅何琪 XIANG Zuquan;JU Hao;SONG Lifei;MAO Yunsheng;FU Heqi(School of Science,Wuhan University of Technology,Wuhan 430070,China;China Shipbuilding and Ocean Engineering Design Institute,Shanghai 200011,China)

机构地区：[1]武汉理工大学交通学院,武汉430063 [2]中国船舶及海洋工程设计院,上海200011

出　　处：《武汉理工大学学报（交通科学与工程版）》2018年第5期772-775,782,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：浮筏系统隔振效果的评价方法中,功率流方法综合考虑了振动的力与速度,从能量的观点分析,但只能对高度简化为梁、板的简单结构进行理论研究;有限元分析方法可以处理大型复杂结构的计算,但不能以能量的观点全面评价隔振效果.文中在有限元分析方法的基础上,结合功率流理论,提出了一种新的评价浮筏隔振效果的方法.在有限元软件ANSYS中直观的建立复杂浮筏系统结构并进行谐响应分析,处理后得到关键节点的力与速度,并由此计算输入系统和从系统输出的功率流,从而判断系统的隔振效果,功率流的传递率越低,表示系统的隔振效果越好.计算结果表明了该方法的实用性和便利性.In the evaluation method of vibration isolation effect of floating raft system, the admittance power flow method comprehensively considers the force and velocity of vibration and analyzes it from the energy point of view. But the admittance power flow method was only useful to theoretical analysis of highly simplified structure such as beam and plate. The finite element analysis method can deal with the calculation of large and complex structures, but it cannot comprehensively evaluate the vibration isolation effect from the viewpoint of energy. Based on the finite element analysis method and combined with power flow theory, this paper presents a new method to evaluate the vibration isolation effect of floating raft. In the finite element software ANSYS, the complex floating raft system structure was intuitively established and harmonic response analysis was carried out. After processing, the force and speed of key nodes were obtained, and the power flow from the input system and the output system was calculated to judge the vibration isolation effect of the system. The lower the power flow transfer rate, the better the vibration isolation effect of the system. The calculation results show that the method is practical and convenient.

关 键 词：浮筏系统 ANSYS 功率流 有限元方法 

分 类 号：TB535.1[理学—物理]