上海交通大学学报

上海交通大学学报（自然版）

• 原子能技术 • 上一篇    下一篇

主蒸汽隔离阀管系振动与噪声分析

徐峥，王德忠，张继革，周文霞   

  1. （上海交通大学 机械与动力工程学院， 上海 200240）
  • 收稿日期:2009-02-18 修回日期:1900-01-01 出版日期:2010-01-29 发布日期:2010-01-29

Analysis for Vibration and Noise Problem of Main Steam 　Isolation Valve with Pipelines

XU Zheng，WANG Dezhong，ZHANG Jige，ZHOU Wenxia(   

  1. (School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2009-02-18 Revised:1900-01-01 Online:2010-01-29 Published:2010-01-29

摘要： 采用有限元法模拟主蒸汽隔离阀内三维湍流非定常激振特性以及管道结构模态和阀腔声学模态，基于时均化流场计算和大涡模拟2种途径，寻找阀门缩颈产生湍流涡的原因，给出了阀门管系可能出现振动与噪声的频率范围，并与其实验结果对比来验证模拟结果的有效性.结果表明，湍流涡形成噪声源的主要频率与阀腔某阶固有声学频率接近，从而产生了声腔共振，并导致显著的阀门振动与噪声.通过多点布置和加速度传感器，现场测得阀门运行工况下的高频谐振成倍增长，且与声腔共鸣频率吻合.

关键词: 主蒸汽隔离阀, 流动特性, 模态分析, 振动与噪声

Abstract: Numerical simulation with finite element method was used to analyze the unstationary characteristic of inner 3D onflow field for the main steam isolation valve (MSIV), the pipeline frame modal and the valve chamber acoustic modal. Based on the two methods of timeaverage flow analysis and large eddy simulation (LES), this paper tries to find the reason and principle of onflow eddy brought by the reduced aperture. The frequency range for the possible vibration and noise of valve pipeline was obtained, which was further proved by the experiment. The result indicates that, the main frequency of noise source engendered by the onflow eddy is close to the certain order connatural acoustic frequency of valve chamber, subsequently the acoustic chamber resonance acts as the main reason for the overhigh vibration and noise. From the onsite measurement which was acquired by laying acceleration transducers at different locations on the MSIV pipeline under real working condition, the multiplefrequency matches with the acoustic chamber resonance frequency.

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