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中文摘要：
通过多体动力学分析方法求解了在缸内气体压力驱动下的活塞侧推力和主轴承座受力，采用混合多体动力响应分析和有限元分析的联合方法求解了在燃烧和机械激励力联合作用下的柴油机表面振动响应，最后应用工程表面振动速度法的方法预测了整机辐射噪声声功率．针对机体提出了基于低噪声目标的结构改进设计方案，仿真结果表明整机辐射A计权噪声降低了3．24dB，为低噪声柴油机的设计和噪声控制提供了崭新的思路．
英文摘要：
Multi-body dynamic analysis method was used to solve the piston lateral force and main bearing load under the excitation of combustion forces. Multi-body dynamic response analysis and finite element analysis method were used to solve the engine surface vibration response excited by combustion and mechanical forces. Surface vibration measurement technique was used to predict the sound power of radiation noise. The improved noise reduction design for the engine block is proposed, and A-weighted sound power level of radiation noise is reduced by 3.24 dB. The radiated noise prediction method provides a new approach for engine noise prediction and control in the design stage.
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同项目期刊论文
Source Separation of Diesel Engine Vibration Based on the Empirical Mode Decomposition and Independe
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