The changing procedure includes : extending of the blade on the tip , extending of the blade on the root , expanding of the surfaces of the blade , extending of the blade on both sides , calculating the balance angle , changing the coordinate system , changing the data on the consideration of the shrinking and the reflecting of the blade material , etc . a blade surface is bended and distorted in three dimensions 具体转化过程包括：叶尖型面延伸、叶根型面延伸、叶身型面余量加放、进排气边余量加放、平衡角的计算、考虑叶片的收缩和回弹、坐标转换等。完成了叶身实体造型。叶身型面是复杂三维弯扭曲面，造型上既有精度要求又有光顺性要求。
In the mda part of this paper , the dynamic model of a full 168 motorcycle was built by adams software . the performance of 168 motorcycle acceleration brake steering and harshness on random road was simulated . the structure parameters of the motorcycle suspension were optimized 在本文的系统动力学分析部分，运用adams软件对嘉陵168车型建立整车的动力学模型，对摩托车的加速、制动、操纵性和平顺性等性能进行了模拟仿真，并以提高平顺性为目的对摩托车的悬架参数进行了优化分析。
