关键词: 振动与波, 不平衡力, 频谱图, 刚性

Abstract: Since FPSO116 put into operation,gas compressor skid had exiting vibration problem，which caused the damages to the pipelines and accessories repeatly.Between two years, the vibration caused five damages to the pipelines and accessories from 2009 to 2010, which led to equipment downtime and gas leaking incidents.FPSO116 reinforeced the pipelines and accessories,and eliminated local vibration effect temporarily. But the whole platform structure still be vibrating badly,，the problem need to be resolved urgently . Thereafter, FPSO116 measured and collected the vibration data to the compressor itself and the platform structure respectively, the vibration data analysis confirm that the insufficient rigidity of the platform structure is the fundamental reason of the vibration, the longitudinal vibration is the main form of the structure’s vibration. Through the reform of main beams, adding longitudinal plate to the six I-beam of single compressor skid platform structure can reduce the vibration effectively, vibration problems was solved.The reform eliminated vibration’s adverse effects to the pipelines and equipments ,avoided the security hidden danger of the pipelines cracking,and gas leaking,can ensure the safety of the equipment and the normal operation of oil field.