Stress wave method in dynamic resistance analysis of an explosion-proof valve

Bartłomiej Pieńko, Z. Szcześniak
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Abstract

The paper presents the concept of a novel stress wave method (SWM) for determining the dynamic reaction of structural elements of an explosion-proof valve. The stress wave method is an original solution to the issue of the dynamic reaction of structural elements and systems. It is particularly recommended in the case of intensive percussive or explosive impacts. The method was developed by the author of works [14, 15]. It reflects the wave nature of stress development. The paper presents the origin, assumptions and the basic dependencies of the method. The characteristics of the method are illustrated by means of solutions to issues closely related to the requirements for testing the resistance of shelter explosion-proof valves. The description also includes a comparison of the calculation results with the results obtained by the finite element method (FEM) and the results of experimental tests. The possibility of significant differences between the compared solutions has been shown. It should be noted that geometric attenuation, reflections and interference of waves are natural for the dynamic reaction of an element and therefore for wave processes. These phenomena can significantly affect the distribution of the parameters of the sought dynamic reaction in space and time. The proposed method of analysis is distinguished by high accuracy of calculations. Keywords: stress waves, structural element vibrations, discrete models, differential solution, explosion- proof valve
应力波法在防爆阀动态阻力分析中的应用
本文提出了一种新的应力波法(SWM)的概念,用于确定防爆阀结构元件的动态反应。应力波法是解决结构单元和体系动力反应问题的一种新颖方法。特别建议在剧烈撞击或爆炸影响的情况下使用。该方法是由著作[14,15]的作者开发的。它反映了应力发展的波动性质。本文介绍了该方法的起源、假设和基本依赖关系。通过对与防护罩防爆阀电阻测试要求密切相关的问题的解决,说明了该方法的特点。文中还将计算结果与有限元法计算结果和试验结果进行了比较。比较的解决方案之间可能存在显著差异。应当指出,波的几何衰减、反射和干涉对于单元的动力反应是自然的,因此对于波的过程也是自然的。这些现象会显著影响所寻求的动力反应参数在空间和时间上的分布。所提出的分析方法具有计算精度高的特点。关键词:应力波,结构单元振动,离散模型,微分解,防爆阀
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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