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SOME ASPECTS OF THE SPRING HANGER DESIGN PROCEDURE FOR PIPING FLEXIBILITY ANALYSIS

机译:弹簧灵活性设计过程的一些方面,用于管道灵活性分析

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Influence of the spring hanger design on the piping flexibility and stress analysis is considered in the presented paper. Three aspects of this procedure are discussed and illustrated by the numerical examples:1. Load variation criteria: different interpretations of load variability could lead to different sizes and even types of selected springs. The key issue of this problem is definition of the cold load (theoretical installed load vs. actual cold load);2 .influence of the different nonlinearities (hanger's side forces due to short rod length and support's friction) on the values of calculated piping thermal movements and hence on the type of selected springs;3. Modeling and interpretation of spring hanger loads within calculation of sustained stresses.Being differently realized in the commercially available programs for piping flexibility analysis these effects are significant for flexible hot pipes and could introduce a big scattering of results.
机译:本文中考虑了弹簧吊架设计对管道柔韧性和应力分析的影响。数值示例讨论并说明了此过程的三个方面: 1.载荷变化标准:载荷变化的不同解释可能导致选定弹簧的尺寸不同甚至类型不同。这个问题的关键是冷负荷的定义(理论安装负荷与实际冷负荷)。 2.不同的非线性(由于短杆长度和支座的摩擦引起的吊架侧向力)对计算的管道热运动值的影响,并因此对所选弹簧类型的影响; 3.在持续应力的计算范围内,对弹簧吊架载荷进行建模和解释。 在市售的管道挠性分析程序中以不同的方式实现了这些效果,对于挠性热管而言非常重要,并且可能会导致大量的结果分散。

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