噪声与振动控制2018，Vol.38Issue(3)：215-220,228,7.DOI:10.3969/j.issn.1006-1355.2018.02.042
非道路高压共轨柴油机振动及噪声分析
Analysis of Vibration and Noise of Non-road High Pressure Co-rail Diesel Engines
摘要
Abstract
Due to the poor working conditions for non-road diesel engines, harsh requests for engine vibration and noise performance is necessary. In this paper, the dynamic model of the engine piston set, the dynamic model of the valve system and the multi-body dynamic model of the whole machine of the non-road high pressure co-rail diesel engine are established respectively by applying multi-body dynamics method. The accuracy of the models is verified by the modal tests of the engine body and the crankshaft. The dynamic characteristics of the piston set and the valve system, the main bearing loads and the vibration and noise characteristics of the whole machine are analyzed. The results show that under the action of the overturning moment of the four-cylinder engine, the second order harmonic and its multiple harmonic can lead to violent vibration of the engine. The vibration on the secondary thrust side is more intensive than that on the main thrust side at second order harmonic. The maximum sound power level 109.1 dB appears on the surface of the oil pan. The maximum of the overall sound pressure level is 85.23 dB at 523 Hz frequency. The results may provide an optimization direction for vibration and noise reduction of diesel engines.关键词
振动与波/柴油机/多体动力学/模态试验Key words
vibration and wave/diesel engine/multi-body dynamics/modal test分类
能源科技引用本文复制引用
张磊,毕玉华,向熔,张宁,宋国富,申立中..非道路高压共轨柴油机振动及噪声分析[J].噪声与振动控制,2018,38(3):215-220,228,7.基金项目
云南省科技创新强省计划资助项目(2015AA024) （2015AA024）
