Study on vibration and noise of high speed diesel engine excited by gear system

摘要

With the rapid development of modern industry, higher speed, more efficiency and bigger power has become the final aim of the diesel. As an important part of mechnical systems, the gear system is widely used in many high speed diesel. With the high load and speed of the gear, the vibration and noise of diesel caused by the gear system become particularly prominent. In order to effectively control the vibration and noise of diesel, the research on meshing and impact excitation of the gear drive is essential.In this paper, a gear system of a diesel is researched. The solid model of gear system is built. The meshing and impact excitation of the gear drive is calculated with the multi-body dynamics theory. The gear bearing excitations are compared under different input rotate-speed. With the finite element analysis method, the dynamic response of the diesel excited by the gear bearing excitation is analyzed. The structural noise of the diesel is predicted by the boundary element method with the result of the dynamics response. The results can be used for the structural noise control of diesel engine.