海洋平台往复压缩机组弹簧隔振设计与应用

Design and application of spring vibration isolation for reciprocating compressors on offshore platforms

为解决海洋平台橇装结构往复压缩机组与安装甲板结构存在刚性动态耦合的问题,根据隔振原理,提出了海洋平台大型往复压缩机组弹簧隔振基础设计的具体计算方法和流程。以锦州25-1 CEPF平台X-2502C压缩机组为例,进行了压缩机橇座结构设计及弹簧隔振器参数计算,采用有限元分析方法对往复压缩机组弹簧隔振基础进行了动力分析,并应用数据采集仪和速度传感器对运行中的CEPF-X-2502C压缩机组进行了现场测试。结果表明,本文提出的弹簧隔振设计方法较好地解决了压缩机组与安装甲板结构的刚性动态耦合问题,有效降低了压缩机组动载荷对甲板结构的动力作用,实测隔振效率达85%以上,压缩机组关键位置振动强度满足要求。本文研究对海洋平台大型往复压缩机组结构设计与安装具有一定的指导意义。

In order to solve the problem of rigid dynamic coupling between the skid-mounted reciprocating compressors on offshore platform and the deck structures,based on the vibration isolation principle,the specific calculation methods and flow chart for designing spring vibration isolation of large reciprocating compressors was put forward.Taking the X-2502 C compressors unit of JZ25-1 CEPF platform as an example,the design of compressors skid structure and the calculation of spring isolation parameters were carried out.The dynamic analysis of spring vibration isolation foundation of reciprocating compressors was conducted with the finite element method,and the field testing on the running CEPF-X-2502 C compressors was conducted with the data collection instrument and the speed sensor.The results showed that the problems of rigid dynamic coupling between the compressors and the deck structure can be solved by the spring vibration isolation design method proposed here.The effect of dynamic load of compressors on deck structures can be reduced effectively.The measured vibration isolation efficiency reached85%;and the vibration strength of key positions in compressors meets the requirements.This study has certain significance for the structure design and installation of large reciprocating compressors on offshore platforms.