基于结构声强法的离心式压缩机橇座振动能量传递特性

Vibration energy transfer characteristics of a centrifugal compressor skid base based on the structural intensity method

海上橇装离心式天然气压缩机集成度高,易产生振动故障。为探究振动能量在压缩机橇座中的传递特性,降低振动控制成本,将结构声强法应用于橇装离心式压缩机的振动控制研究领域。综合运用自编程序与有限元工具建立了压缩机橇座结构声强场分析模型,结合数据可视化技术,提出了橇座结构声强分析及可视化方法。应用该方法求解并可视化了橇座的结构声强场,研究了橇座中振动能量的传递特性以及机械能与结构声强的定量关系,确定了极限工况下振动能量在橇座中的主要传递路径、振源和振汇。针对精密设备敏感区域,提出了振动控制措施。研究结果表明,压缩机安装区域的结构声强幅值最大,振动能量主要转化为橇座的运动能,振动能量主要沿着橇座宽度和高度方向发散式传递。所得研究成果,在工程领域可为压缩机橇振动控制提供支持,理论方面亦可为板梁复合结构振动能量传递特性研究提供依据。

Offshore skid mounted centrifugal natural gas compressors are highly integrated and prone to vibration failures.In order to explore the transfer characteristics of vibration energy in the compressor skid and reduce the cost of vibration control,the structural sound intensity method was applied to the vibration control of a skid-mounted reciprocating compressor.The acoustic intensity field analysis model of the skid base was established by using selfprogramming and finite element tools.Combined with the data visualization technology,the acoustic intensity analysis and visualization method of the skid base was proposed,and then applied to solve and visualize the structural acoustic intensity field of the skid base.The transfer characteristics of vibration energy in the skid base and the quantitative relationship between mechanical energy and structural acoustic intensity were studied,the main transfer path,vibration source and vibration manifold of vibration energy in the skid base under the extreme working conditions were revealed.Vibration control measures were proposed for the sensitive area of precision equipments.The results show that the maximum amplitude of structural sound intensity appears in the compressor installation area,the vibration energy is mainly converted into kinetic energy of the skid base,and the vibration energy is mainly transferred in a divergent manner along the width and height of the skid.The research results give support to the vibration control of compressor skids in the engineering field and provide a basis for the study of vibration energy transfer characteristics of plate and beam composite structures in the theoretical aspect.