e)是Y1和Y2的中心距。
从设计变量b到e的上下偏差在连杆合理的条件下被选用。
结果
用ANSYS进行数据模型的优化，连杆的优化模型见 图7 。采用三维有限元网格的最优形状为图8。从最优的模型中发现，曲柄端和活塞销端的外半径大于最初的值。在最优形状的胫节有较长且厚度等于零的槽,这意着最优连杆形状在胫节有个空心槽。最优连杆的体积比最初设定的体积少10.5%。
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