Numerical model of interation of package of open shells with a weakly compressible filler in a friction shock absorber

Q2 Materials Science

Engineering Solid Mechanics Pub Date : 2022-01-01 DOI:10.5267/j.esm.2022.3.002

A. Velychkovych

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引用次数: 6

Abstract

The problems of protecting equipment, structures and operators from the harmful effects of vibrations are among the most painful topics of modern mechanical engineering. In this research an original design of a friction shock absorber is presented in which the principle of operation is based on the contact interaction of a package of open shells with weakly compressible deformable filler. The proposed design is simple and technologically advanced, suitable for operation under high dynamic loads and at the same time has a compact transverse dimension. Such shock absorbers are projected to be used in the mining and oil and gas industries. A finite element model of a friction shock absorber with two contact pairs has been constructed: the first contact pair is "filler - package of open shells"; the second contact pair is "inner shell of the package - outer shell". The contacting bodies were presented as separate arrays of finite elements and the conditions of frictional interaction on the contact surfaces were set in the form of Coulomb's law. We considered the behavior of such a structurally nonlinear system under the action of a monotonic and nonmonotonic load. In the course of the study, the main operational characteristics of the shock absorber including the strength, rigidity, hysteresis characteristics and natural frequencies were determined. The possibility of adjusting the rigidity and shock-absorbing characteristics of the proposed device is discussed.

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摩擦减振器中开口壳与弱可压缩填料相互作用的数值模型

保护设备、结构和操作人员免受振动的有害影响是现代机械工程中最令人痛苦的话题之一。本文提出了一种摩擦减振器的原始设计，其工作原理是基于带有弱可压缩可变形填料的一组开壳的接触相互作用。所提出的设计简单，技术先进，适合在高动载荷下运行，同时横向尺寸紧凑。预计这种减震器将用于采矿、石油和天然气工业。建立了具有两个接触对的摩擦减振器有限元模型:第一个接触对为“填料-开壳包”;第二个接触对是“封装的内壳-外壳”。将接触体表示为独立的有限元阵列，并以库仑定律的形式设置接触面上的摩擦相互作用条件。我们考虑了这类结构非线性系统在单调和非单调荷载作用下的行为。在研究过程中，确定了减振器的主要工作特性，包括强度、刚度、滞回特性和固有频率。讨论了调整该装置的刚度和减震特性的可能性。

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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来源期刊

Engineering Solid Mechanics Materials Science-Metals and Alloys

CiteScore

3.00

自引率

0.00%

发文量

期刊介绍： Engineering Solid Mechanics (ESM) is an online international journal for publishing high quality peer reviewed papers in the field of theoretical and applied solid mechanics. The primary focus is to exchange ideas about investigating behavior and properties of engineering materials (such as metals, composites, ceramics, polymers, FGMs, rocks and concretes, asphalt mixtures, bio and nano materials) and their mechanical characterization (including strength and deformation behavior, fatigue and fracture, stress measurements, etc.) through experimental, theoretical and numerical research studies. Researchers and practitioners (from deferent areas such as mechanical and manufacturing, aerospace, railway, bio-mechanics, civil and mining, materials and metallurgy, oil, gas and petroleum industries, pipeline, marine and offshore sectors) are encouraged to submit their original, unpublished contributions.