Abstract
Rubber bush used in the suspension of an automobile is a significant element for the riding comfort and the driving stability. Since the rubber bush has a high stiffness, a vehicle model with rubber bushes has high natural frequencies. In the analysis of such a stiff system, a small time-step is required to consider the high natural frequency. As a result, the amount of the calculation is increased. However, in real-time analysis, it is necessary to calculate each step of numerical integration within a specified time. Therefore, real-time analysis of a stiff system requires high computational efficiency. In this paper, the formulation of multibody dynamics and the method of numerical integration were investigated for the real-time analysis of the stiff systems, and the execution speed and the accuracy of analysis were evaluated.
