Whirl Vibration Analysis of Engine Cooling Fan Using 3D and 1D Simulation

Abstract

A method is described for numerically analyzing the vibration resistance of diesel engine cooling fans. The coupled vibration of the blade and rotating-shaft systems in the whirl vibration of the cooling fan is formulated using a four-degree-of-freedom model. A detailed simulation model constructed using a multi-body dynamics model is used to express the dynamic behavior of the cooling fan. Comparison of the simulation results with the experimental results demonstrated the effectiveness of the simulation model.