潍柴动力股份有限公司，山东 潍坊 261061
Abstract：Aiming at the fracture of the bellows at the pressure end of the supercharger in the test of a highpower marine engine, the AVL_PU software is used to establish a simulation model of the whole machine, and the simulation calculation and the vibration test are compared and analyzed. The results show that the first-order simulation calculation of the model is consistent with the vibration test results, and the error is within 10%; the maximum vibration velocity in the x and y directions of the fracture point exceeds the limition of 20 mm/s, which is the main reason for the fracture. By increasing the thickness of the flywheel shell and the support ribs, the rigidity of the supercharger support structure is improved, the simulation and test results of the optimized maximum vibration velocity at the breaking point of the engine are all lower than the limitition, which meets the design requirements.
Keywords:marine engine; vibration; fracture; simulation; stiffness