{"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":"59 2","pages":"909 - 926"},"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.
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.
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