HG/T21629中W1型减振支架的设计和模拟分析

Design and Simulation Analysis of W1 Anti-vibration Clamp in HG/T21629

规范HG/T21629中W1碟簧减振支架广泛应用于存在振动风险管道的支撑,在实际的静态应力分析过程中,设计人员一般将此类支架在CAESARII中建模为上下压紧的Y型约束和无间隙的导向约束组合,这种组合仅仅考虑了管道以及介质重量的摩擦,忽略了碟簧预紧摩擦力的影响,会对计算结果造成很大的影响。本文主要针对这一问题,讨论如何采用CAESARII中平移双作用双线性支架对W1型碟簧减振支架进行准确模拟,其中,对预紧摩擦力,建议按照动态荷载的大小、碟簧的适用范围以及摩擦系数进行选取,设计说明中应增加对安装的要求,确保预紧力的准确。在实例模拟中,分别采用考虑预紧摩擦力和未考虑预紧摩擦力两种方法进行计算,通过对其荷载和位移进行比较,建议使用W1型减振支架时,要将由于管道热胀对支架产生的摩擦轴向推力作为结构设计荷载予以考虑。

The W1 disc spring anti-vibration clamp in HG/T21629 is widely used for supporting pipelines with vibration risks.In the actual static stress analysis,designers generally model such supports in CAESARII as a combination of Y and guided restraints without gaps.This combination only considers the friction of pipeline and medium weight,ignoring the influence of preload of disc spring,which will have a significant impact on the calculation results.This article mainly focuses on this issue and discusses how to accurately simulate the W1 type disc spring anti-vibration clamp using the translational double acting bilinear restraints in CAESARII.It is recommended to select preload according to dynamic loads,the applicable range of disc spring,and the friction coefficient.The design specification should include requirements for installation to ensure the accuracy of preload.In the example simulation,two methods are used to calculate the preload friction force and no preload friction force.By comparing their load and displacement,it is recommended to use the W1 type disc spring anti-vibration clamp.It should be noted that the axial friction force generated by thermal expansion of the pipeline on the support should be considered as the structural design load.