Aiming at the vibration problem of a marine diesel supercharger caused by resonance,the resonance sources and the influence of temperature on the modal frequency were analyzed by experiment and simulation.The improved methods were proposed and verified according to the test results.The results of analysis show that there are two resonance peaks for the supercharger under full-load working condition.The amplitude of the second peak is the highest,which is caused by the coupling between the natural frequency of the supercharger and main excitation,and should be considered as the key direction of optimization.Due to the influence of temperature on elastic modulus,the modal frequency of high temperature parts such as the supercharger on the diesel engine decreases with the increase of operating temperature.In addition,changing compressor pipe connection and adding fixed support cannot make the supercharger modal frequency avoid from the main excitation frequency of diesel engine.Finally,by canceling the exhaust joint pipe and reducing the height of the gravity center,the modal frequency and vibration amplitude of the supercharger can meet the limit requirements.The research results of this paper may provide a reference for the investigation and optimization of the turbocharger resonance.
关键词
振动与波/船用柴油机/增压器/共振/测试分析/优化设计
Key words
vibration and wave/marine diesel engine/turbocharger/resonance/test analysis/optimization design
维普
万方数据