关键词: 基座结构, 阻振质量, 振级落差, 船舶柴油机, 隔振

Abstract: The vibration generated by the power equipment is mainly transmitted to the hull through the base, and the vibration isolation performance of the vibration isolation performance of the diesel engine active vibration isolation system is studied to reduce the vibration transmission of the power equipment. Based on the vibration damping quality, the structural performance of the active vibration isolation system of diesel engine was studied, and the influence of the excitation factors of the active vibration isolation system on the vibration isolation performance analysis of the base was considered. The influence of parameters such as quantity, type, arrangement and size of vibration resistance on the vibration isolation performance of the base was studied, and a test bench for the vibration isolation performance of the vibration resistance quality base was built, and related experimental studies were carried out. The results show that in the frequency band of 0~500Hz, the test results of the vibration level drop of the base are in good agreement with the trend of the simulation results, and the vibration level drop error is 0.2dB, and the vibration level drop of the vibration quality base can be increased by 2.8dB. The research results can provide a reference for the design of vibration isolation performance of marine diesel engine base structure.

Key words: pedestal structure, vibration damping quality, vibration level drop, marine diesel engines, Vibration isolation