无极速度图绘制的仿真研究

Simulative study of the non-polar velocity figure drawing

针对无极速度图法在确定平面机构的速度、虚位移关系和分析平面结构几何构造等方面过程中,徒手绘制无极速度图有时会产生误差的问题,文章提出改进方法,即通过编制程序,并利用计算机绘制无极速度图来解决这个问题。通过算例表明:利用该法绘制无极速度图,不仅绘制速度提高,而且基本消除误差,从而使得应用无极速度图法解决与分析问题更加方便。

The non-polar velocity figure method is a useful method in ascertaining the velocity of plane structure and the relationship of virtual displacements, moreover it is often used to analysis the geometric construction of plane structure. In order to improve the accuracy of non-polar velocity figure drawing with hand further, an improvement is proposed by programming with computer. The simulation results show that the new method can not only greatly speed figure drawing, but also transits high precision in the process as well. Therefore it can effectively overcome the inconvenience of the old method.