UC知道哪位高手帮忙翻译一下 急 谢谢 不要在线翻译的
来源：百度知道 编辑：UC知道 时间：2024/06/04 04:27:26
A two-story frame that has been used as a test problem in Refs. 135 and 148 is first considered. Two loading conditions are imposed, as shown in Fig 4.18 and denoted by symbols I and II. The lower limit on moment of inertia of each dement is l.Oin.4 and a displacement limit in both the x1 and x2 directions is 1.0 in. at nodes 2, 3, 4, 5, 6, and 7. Table 4.16 gives optimum designs for this structure.
The frame is first designed with stress constraints only. The minimum weight in this case is 8292 lb, which was obtained in 14 iterations with a computation time of 6.45 sec. The comparable final weight reported in Refs. 135 and 148 is 8810 1b, which is higher by approximately 6%.
The frame is also designed with all constraints enforced. The resonant frequency limit in this case is 15.0 Hz. The optimum weight obtained is 9722.5 1b, with a computation time of 12.21 sec for 12 iterations. Figure 4.19 shows the variation of the cost function with iteration number.
The frame is first designed with stress constraints only. The minimum weight in this case is 8292 lb, which was obtained in 14 iterations with a computation time of 6.45 sec. The comparable final weight reported in Refs. 135 and 148 is 8810 1b, which is higher by approximately 6%.
The frame is also designed with all constraints enforced. The resonant frequency limit in this case is 15.0 Hz. The optimum weight obtained is 9722.5 1b, with a computation time of 12.21 sec for 12 iterations. Figure 4.19 shows the variation of the cost function with iteration number.
译：
两个故事框架已被用来作为测试问题，在参。 135和148是第一考虑。两个载荷条件强加，如图所示，在图4.18和记符号的第一卷和第二卷。下限就转动惯量，每dement是l.oin.4和位移限制在X1的和X2方向是1.0英寸在节点2 ， 3 ， 4 ， 5 ， 6 ， 7 。表4.16给出了优化设计，为这个结构。
该帧是最初设计与应力约束而已。最低重量在这种情况下，是8292磅，这是在得到了14次迭代与计算时间的6.45秒。可比最后体重报道，在参。 135和148是8810扩散行为，是高约6 ％ 。
该帧是设计也与所有的限制执行。共振频率的限制，在这种情况下，是15.0赫兹。最佳重量所得9722.5扩散行为，以计算时间的12.21秒的12次迭代。图4.19显示了变异的成本函数与迭代次数。