注塑模冷却系统二维优化设计

Two-dimentional Optimum Design for Cooling System of Injection Molds

本文以周期平均温度场为前提，应用边界元法给出了注塑模型腔温度及型腔各点温度对设计变量灵敏度的计算公式。在计算型腔温度时采用选代算法，同时分析注塑动模和定模。在优化设计中，以型腔表面各点温度与某一设定目标温度的均方差为目标函数，在一定的约束条件下，通过寻求目标函数的最小值求出冷却管道的优化位置和尺寸，并用实例进行了验算。

According to periodical average temperature field, the boundary element method was used to give a formula for calculating the temperature distribution,over the cavity surface and its sensitivity to the design variables for steadystate heat conduction. As both the moving and the stationary parts of an injection mold should be handled simultaneously, an iterative method was used to calculate the temperature. In order to get an optimum design, the search for the minimum value of an objective function,the mean squarl deviation of cavity temperatures from object temperature under some restrain conditions is used to optimizing the design of cooling-line, i.e. the cooling line's locations and their sizes. Through a numerical example, the effectiveness of the presented approachwas illustrated.