Optimum structures
Optimum structures
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最佳结构
作者：
H. L. Cox
结构设计涉及三个参数在空间中分布的相互关系，即外加荷载、材料的局部密度和材料中的应力。从伯努利和欧拉时代起，通常的做法是取第一个值的赋值，到冒险猜测第二个值，然后计算第三个值：多年来，这种方法的发展只是改进了迭代方法，以调整第二步中的猜测。理想情况下，假设应力分布，从而计算出材料的适当分布，会更符合逻辑。不幸的是，这种做法受到了巨大困难的阻碍。这就是这本书的全部内容，它确实包含了该领域目前所知的几乎所有内容。
The design of structures concerns the inter-relation of the distributions in space of three parameters, namely the applied loading, the local density of material and the stress in that material. From the time of Bernoulli and Euler the normal practice has been to take assigned values of the first, to hazard guesses as to the second and then to compute the third: and in this manner of approach development over the years has been little more than improvement in methods of iteration to adjust the guesses in the second step. Ideally it would be far more logical to postulate the distribution of stress and hence to compute the proper distribution of material. Unluckily this manner of approach is hedged about by formidable difficulties. That is what this book is all about, and it does indeed comprise virtually all that is at present known in this field.