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以箱式截面构件为主要对象的《主间板系组合结构通用程序》(简称RRR程序)是为在重型机械行业广泛应用有限单元法而研制的。该程序采用子结构位移法,在“6912”机上记带次数不超过12次时,可处理上万个自由度的问题。 RRR程序1978年底审查会通过,建议尽快推广使用,为此本刊特组织发表《RRR空间板系组合结构静力计算通用程序》和《有限单元法在重机行业中应用》两篇文章。本篇介绍RRR程序采用的子结构位移法、缩约法、样条插植法、波前法的原现、程序处理等新技术。
The main program of the main slab system combined structure (RRR program) with the box section as the main object is developed for the extensive application of the finite element method in the heavy machinery industry. The program uses the sub-structure displacement method, in the “6912” machine recorded the number of times does not exceed 12 times, you can handle tens of thousands of degrees of freedom problems. The RRR process was approved by the review committee at the end of 1978 and recommended to be popularized as soon as possible. For this purpose, the organization published two articles, “General Procedure for Static Computation of RRR Space Panels and Composite Structures” and “Application of Finite Element Method in Heavy Machinery Industry”. This section describes the RRR program using substructure displacement method, reduction method, spline implantation method, wavefront method of the original, program processing and other new technologies.