Based on the calculation of the characteristic parameters of curved surface dipoles by moment method, the directivities are optimized, the maximum directivities of curved surface dipoles are obtained.
Firstly the thesis introduces computational analysis theory about curved bridge, get a preliminary understanding about the stress characteristic and analytical method for curved girder.
本文首先介绍目前有关于弯梁桥的计算分析理论，对弯梁桥的构造与受力特点以及分析方法有一个初步的认识。
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The author expounds the feasibility and characteristic of numeric control turn-milling technology through analysing technical problems of the curved turn milling.