单自由度双曲柄六杆压力机机构计算机建模与动态静力分析向量键合图法

Vector Bond Graph Method for the Computer Modeling and Kineto-static Analysis of a Single-DOF Double Crank Six-bar Press Mechanism

针对单自由度双曲柄六杆压力机机构计算机建模与动态静力分析问题,提出了相应的向量键合图法。根据机构的结构及组成原理,建立其向量键合图模型;通过有效的方法,使机构向量键合图模型的贮能元件皆具有积分因果关系,解决了机构动态静力分析计算机建模的代数困难。应用相应的算法,实现了单自由度双曲柄六杆压力机机构计算机建模与动态静力分析,分析了脉冲形式的工作阻力对机构驱动力矩及运动副约束反力的影响,说明了所述方法的可靠性及有效性。

For the problem of computer modeling and kineto-static analysis for a single-DOF double crank six-bar press mechanism,the corresponding vector bond graph method is proposed.From the mechanism structure and composition principle,the corresponding vector bond graph model is built.By the effective meth⁃od,all the energy storage elements of the mechanism vector bond graph posses integral causality.As a result,the algebraic difficulty of computer modeling for mechanism kineto-static analysis is solved.By the correspond⁃ing algorithm,the computer modeling and kineto-static analysis of a single-DOF double crank six-bar press mechanism is realized,the effect of the pulse working resistance on mechanism driving moment and joint con⁃straint force is analyzed,and the reliability and validity of the procedure proposed is illustrated.