Simulation Study on the Influence of Single Balance Shaft Mechanism on Noise Radiation of 3-Cylinder Engine

In this paper, simulation work was conducted to evaluate the vibration and noise of a 3-cylinder diesel engine. The finite element model of the whole engine and the dynamic model of the crankshaft system were established respectively. The boundary element method and the modal-based acoustic transfer vector (MATV) method were used to calculate the acoustic and vibration response, and the characteristic points were selected to monitor the radiated noise in the external acoustic field. Finally, through the structural optimization of the diesel engine model, the influence of adding a single balance shaft on the sound radiation of the whole machine was analyzed. The research results of this paper will provide technical support for the design of shock absorption and noise reduction of 3-cylinder engine in the application of unmanned ground vehicles (UGV), outboard engine, Unmanned Aerial Vehicles (UVA) and hybrid power system. (paper)