用于管路的二重动力吸振器设计与试验  

Design and Experimental Study of Frequency Adjustable Dual Dynamic Vibration Absorber for Nuclear Power Unit Pipeline

作　　者：任志英[1] 朱怀文 梁盛涛 何明圆 李振 REN Zhiying;ZHU Huaiwen;LIANG Shengtao;HE Mingyuan;LI Zhen(Institute of Metal,Rubber and Vibration and Noise,Fuzhou University Fuzhou,360116,China;Fujian Fuqing Nuclear Power Co.,Ltd.Fuqing,350318,China)

机构地区：[1]福州大学金属橡胶与振动噪声研究所,福州360116 [2]福建福清核电有限公司,福清350318

出　　处：《振动.测试与诊断》2025年第1期103-109,203,共8页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(52175162,51805086,51975123)。

摘　　要：核电机组中机械设备的振动会传递到与其相连的管路中,容易发生管路失效与气体泄露等事故,传统管路减振装置因管路布置复杂,存在安装困难和减振效果不理想等问题。针对上述情况,设计了一种结构简单且质量可调的二重动力吸振器(double dynamic vibration absorber,简称DDVA)。首先,根据机组管路实际参数对该动力吸振器进行参数设计,通过定点理论,以位移振幅比为参考对动力吸振器不断迭代优化,确定了DDVA的最优刚度与最优阻尼;其次,通过有限元仿真验证管路添加DDVA后的吸振效果,并与单个动力吸振器(single dynamic vibration absorber,简称SDVA)的吸振效果进行比对;最后,通过台架试验对DDVA吸振效果进行了试验验证。结果表明,DDVA将管路共振频率下的径向振动加速度降低了65%以上,吸振效果达到9 dB以上,这对于管路的吸振设计具有一定的工程指导意义。The vibration of the equipment in nuclear power unit will be transmitted to the pipeline connected with it,which is easy to cause pipeline failure,gas leakage and other safety accidents.This paper designs a kind of double dynamic vibration absorber(DDVA)with simple structure and adjustable mass to solve the above problem.Firstly,the parameters of the DDVA are designed according to the actual working condition of pipe⁃line.After continuous iterative optimization based on fixed-point theory and displacement amplitude ratio,the optimal stiffness and damping ratio of DDVA are determined.Furthermore,the vibration absorption effect of the pipeline with DDVA is verified by finite element simulation and compared with the pipeline with single dy⁃namic vibration absorber(SDVA).Finally,the vibration absorption effect of DDVA is verified by bench test.The experimental results show that the DDVA reduces the radial vibration acceleration at the resonant frequency of pipeline by more than 65%(9 dB).The research can provide a guiding significance for the vibration absorp⁃tion design of pipeline.

关 键 词：核电管路 动力吸振器 二自由度 有限元分析 调频 

分 类 号：TB535[理学—物理]