Effect of CM Location on Vibration of Diesel Engine Isolation System

Abstract

An diesel engine with four elastic supports was modeled to deeply study the vibration response characteristics of diesel engine, and the each support with three-dimensional isolators was modeled by ADAMS. During analysis, the rotating speed of diesel engine is constant, and the mass center of whole engine body (CM) is changed, the responses were studied. The results show that at the constant rotating speed, with the change of CM location, its motion torque has the stable trends and magnitude, with a change ratio below 0.47%, but the displacement of engine body center changed with a 5.46% ratio, and the four vertical springs have the different vibration velocity curves, with a ratio high to 32.53% in analysis case 2 than others’. Keywords—diesel engine; elastic supports; center of mass; vibration response