リンク機構を有する鉄道車両のための運動方程式自動生成プログラム'EXPRESS'の開発(<論文特集>計算固体力学におけるイノベーション)

概要

論文の詳細を見る
For the numerical analysis of a dynamic system, it is necessary to have equations of motion for the system. Up to now, Lagrange's method has been used to derive equations of motion for a rail vehicle. However, it needs much time and labor to derive the equations of motion because the analytical model has a number of degrees of freedom. Moreover, when the vehicle has a linkage mechanism like a forced steering one, the derivation becomes more burdensome. This paper deals with the development of automatic forming program of equations of motion 'EXPRESS' for rail vehicles containing complex linkage mechanisms, and also deals with the dynamic analyzing system that uses this program. As an application example, the equations of motion of a forced steering rail vehicle are formed and the calculations of numerical simulation, frequency response and eigenvalue analysis are performed. The obtained results represent well the characteristics of a forced steering rail vehicle, and thus the equations of motion formed by the program 'EXPRESS' are confirmed to be valid. And it is shown that the use of the program 'EXPRESS' has possibility for reducing time required to examine a new type vehicle containing complex mechanism.
2001-12-15