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对圆环辐射梁式空间桁架的主力骨架的计算,本文提供了一个程序。本程序自动形成节点坐标、节点荷载,计算在朝天自重、指平自重、风正吹、正晒温变、风侧吹等五种单项荷载及其任意组合下天线在各不同仰角的节点位移、各杆内力与应力、最佳吻合抛物面的参数、各点对吻合面的加权半光程差及其均方根值。本文并对这类天线结构计算中的一些问题(对称性的利用及边界处理、荷载问题、最佳吻合抛物面等)在程序涉及的范围内进行了阐明。
This article provides a procedure for calculating the main skeleton of a toroidal beam-space truss. The program automatically forms the node coordinates and node loads and calculates the displacements of the antennas at different elevation angles under five kinds of single loads and any combination of the five kinds of single loads such as overturn weight, The internal force and stress of each rod, the parameters of the best paraboloid, the weighted half-path length difference and the root-mean-square value of each point to the anastomosis surface. In this paper, some problems in the calculation of such antenna structures (symmetry utilization and boundary treatment, load problems, best match parabolism, etc.) are clarified in the scope of the procedure.