主轴部件优化设计(二) 三、主轴部件优化设计实例 图4-8所示的机床主轴为三支承主轴部件系统,受集中力和力矩作用。本优化设计问题以主轴外径尺 寸D和轴上各段跨长L为设计变量。x1(i=1,2,…,r:),要求轴悬伸端点处挠度Y不超过许用值y0=0.05mm;主轴结构的第一阶自振频率f不低于给 Optimum Design of Spindle Components II. Example of Optimization Design of Spindle Components The spindle of the machine tool shown in Fig. 4-8 is a system of three support spindle components, which is subjected to the functions of concentration and torque. The optimization design problem to the spindle diameter D and the length of the various sections of the shaft length L design variables. x1 (i = 1, 2, ..., r :), require the end of the shaft cantilever deflection Y does not exceed the allowable value y0 = 0.05mm; the first order natural frequency of the spindle structure f is not less than