Modal Coupling Vibration Analysis of Bolted Casing System Based on Surface Contact Mechanics

IF 0.6 4区工程技术 Q4 MECHANICS

Mechanics of Solids Pub Date : 2024-07-12 DOI:10.1134/S0025654424600077

Xianjun Zeng, Ning Hu

{"title":"Modal Coupling Vibration Analysis of Bolted Casing System Based on Surface Contact Mechanics","authors":"Xianjun Zeng, Ning Hu","doi":"10.1134/S0025654424600077","DOIUrl":null,"url":null,"abstract":"<p>The casing system is the skeleton of the aero-engine, and its vibration directly reflects the vibration level of the whole aero-engine. Different from the previous modeling of the casing system as a cylindrical shell, this paper creatively establishes the lumped mass modal coupling vibration model of the bolted connection casing system from the perspective of micro contact mechanics. The bolted connection characteristics and Hertz contact characteristics of micro topography of discontinuous casing are considered, which rarely appear in previous studies on casing system modeling. The paper first completes the interface contact mechanics modeling of bolted connection, and then the establish interface contact mechanics model is effectively verified (by comparing with classical model and finite element model). Based on the established contact mechanics model of the connection interface, a modal coupling model of the casing system is established. The effects of interface stiffness ratio, interface fractal parameters, the number of connection bolts and friction coefficient on the stability of the system are analyzed. This study establishes a bridge between micro contact and macro system vibration analysis, which can be used to establish the dynamic model of similar bolted connection system in engineering.</p>","PeriodicalId":697,"journal":{"name":"Mechanics of Solids","volume":null,"pages":null},"PeriodicalIF":0.6000,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mechanics of Solids","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S0025654424600077","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MECHANICS","Score":null,"Total":0}

引用次数: 0

Abstract

The casing system is the skeleton of the aero-engine, and its vibration directly reflects the vibration level of the whole aero-engine. Different from the previous modeling of the casing system as a cylindrical shell, this paper creatively establishes the lumped mass modal coupling vibration model of the bolted connection casing system from the perspective of micro contact mechanics. The bolted connection characteristics and Hertz contact characteristics of micro topography of discontinuous casing are considered, which rarely appear in previous studies on casing system modeling. The paper first completes the interface contact mechanics modeling of bolted connection, and then the establish interface contact mechanics model is effectively verified (by comparing with classical model and finite element model). Based on the established contact mechanics model of the connection interface, a modal coupling model of the casing system is established. The effects of interface stiffness ratio, interface fractal parameters, the number of connection bolts and friction coefficient on the stability of the system are analyzed. This study establishes a bridge between micro contact and macro system vibration analysis, which can be used to establish the dynamic model of similar bolted connection system in engineering.

Abstract Image

查看原文本刊更多论文

基于表面接触力学的螺栓连接套管系统模态耦合振动分析

摘要机匣系统是航空发动机的骨架，其振动直接反映了整个航空发动机的振动水平。与以往将机匣系统作为圆柱壳体建模不同，本文从微接触力学角度出发，创造性地建立了螺栓连接机匣系统的块状质量模态耦合振动模型。考虑了非连续套管微观形貌的螺栓连接特性和赫兹接触特性，这在以往的套管系统建模研究中很少出现。本文首先完成了螺栓连接的界面接触力学建模，然后对建立的界面接触力学模型进行了有效验证（通过与经典模型和有限元模型的比较）。在已建立的连接界面接触力学模型基础上，建立了套管系统的模态耦合模型。分析了界面刚度比、界面分形参数、连接螺栓数量和摩擦系数对系统稳定性的影响。该研究在微观接触和宏观系统振动分析之间架起了一座桥梁，可用于建立工程中类似螺栓连接系统的动态模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Mechanics of Solids 医学-力学

CiteScore

1.20

自引率

42.90%

发文量

112

审稿时长

6-12 weeks

期刊介绍： Mechanics of Solids publishes articles in the general areas of dynamics of particles and rigid bodies and the mechanics of deformable solids. The journal has a goal of being a comprehensive record of up-to-the-minute research results. The journal coverage is vibration of discrete and continuous systems; stability and optimization of mechanical systems; automatic control theory; dynamics of multiple body systems; elasticity, viscoelasticity and plasticity; mechanics of composite materials; theory of structures and structural stability; wave propagation and impact of solids; fracture mechanics; micromechanics of solids; mechanics of granular and geological materials; structure-fluid interaction; mechanical behavior of materials; gyroscopes and navigation systems; and nanomechanics. Most of the articles in the journal are theoretical and analytical. They present a blend of basic mechanics theory with analysis of contemporary technological problems.