基于阻抗传递原理的减振接管阻抗测试方法  

Impedance Measurement Method for Flexible Pipes based on Impedance Transfer Principle

作　　者：戴俊 商超 王帅 朱海雄 陶襄樊 DAI Jun;SHANG Chao;WANG Shuai;ZHU Haixiong;TAO Xiangfan(Representative Office Stationed in Huludao 431 Factory,Huludao 125004,Liaoning China;Wuhan No.2 Ship Design ＆ Research Institute,Wuhan 430205,China)

机构地区：[1]海军驻葫芦岛四三一厂军代表室,辽宁葫芦岛125004 [2]武汉第二船舶设计研究院,武汉430205

出　　处：《噪声与振动控制》2018年第6期213-216,共4页Noise and Vibration Control

摘　　要：针对减振接管阻抗的测试问题,提出一种基于阻抗传递原理的简易化测试方法。首先,将减振接管模型简化为两端为质量、中间为弹簧和阻尼的阻抗模型。随后,利用阻抗传递原理建立减振接管在机械系统中的振动传递方程,推导了减振接管阻抗的计算公式。然后,通过试验测试水泵转速为1 200 r/min工况下减振接管两端的振动,结合接管后管网的原点阻抗,可反求得到减振接管的阻抗特性曲线。最后,利用反求的接管阻抗,预报水泵其他转速工况下减振接管远泵端的振动响应。结果表明:基于此方法的振动预报值与试验值最大误差在3.5 dB以内,满足工程应用要求。Based on impedance transfer principle, a simplified method is proposed for impedance test of flexible pipes. Firstly, the flexible pipe is simplified as the impedance model with the mass concentrated at both ends and spring and damping at the middle of the pipe. Then, based on the impedance transmission principle, the vibration transfer equation of the flexible pipe is established, and the calculation formula of the impedance is derived. Afterwards, by testing the vibration of both ends of the flexible pipe under working condition of the pump at 1 200 r/min, the impedance characteristic curve can be obtained according to the impedance at the origin of the pipe network. Finally, the vibration responses of the flexible pipe end far from the pump under other working conditions are predicted. The results show that the maximum difference between the prediction value and the test value of the vibration response is within 3.5 dB, which meets the engineering requirements.

关 键 词：振动与波 减振接管 阻抗特性 隔振效果 

分 类 号：O329[理学—一般力学与力学基础] TB532[理学—力学]