东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (5): 686-692.DOI: 10.12068/j.issn.1005-3026.2020.05.013

• 机械工程 • 上一篇    下一篇

考虑螺栓连接的吊挂式薄壁柱壳固有特性分析

马辉1,2， 付强1， 李坤1， 樊富友3   

  1. (1.东北大学 机械工程与自动化学院， 辽宁 沈阳110819； 2.东北大学 航空动力装备振动及控制教育部重点实验室， 辽宁 沈阳110819； 3.中国兵器集团公司 长沙机电产品研究开发中心， 湖南 长沙410100)
  • 收稿日期:2019-06-05 修回日期:2019-06-05 出版日期:2020-05-15 发布日期:2020-05-15
  • 通讯作者: 马辉
  • 作者简介:马辉(1978-)，男，河北安平人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(11772089)； 装备预研领域基金资助项目(61402100102)； 装发联合基金资助项目(6141B0210201)； 中央高校基本科研业务费专项资金资助项目(N170308028，N180708009).

Natural Characteristics Analysis of Suspended Thin-Walled Cylindrical Shells with Bolted Connections

MA Hui1,2， FU Qiang1， LI Kun1， FAN Fu-you3   

  1. 1.School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China; 2.Key Laboratory of Vibration and Control of Aero-Propulsion Systems， Ministry of Education， Northeastern University， Shenyang 110819， China; 3. Changsha Electromechanical Product Research and Development Center， China South Industries Group Corporation， Changsha 410100， China.
  • Received:2019-06-05 Revised:2019-06-05 Online:2020-05-15 Published:2020-05-15
  • Contact: MA Hui
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摘要： 以含螺栓连接的吊挂式薄壁柱壳为研究对象，采用商用有限元分析软件ANSYS建立了系统的全实体/梁-壳混合有限元模型.基于所建立的模型，分析讨论了自由/约束边界，法兰/吊挂处预紧力对系统固有特性的影响，并通过试验进行了对比验证.研究结果表明:本文所建立的有限元模型能较好地模拟螺栓连接处界面接触压力及其分布情况，且在保证一定精度的前提下，梁-壳混合模型较全实体模型的计算效率高；吊挂约束的存在对系统的固有频率和振型影响较大；法兰处螺栓预紧力对系统第5~8阶固有频率影响较大，而吊挂处螺栓预紧力对系统前3阶固有频率影响较大.

关键词: 螺栓连接, 吊挂, 薄壁柱壳, 固有特性, 预紧力

Abstract: Toward the suspended thin-walled cylindrical shell with bolted connections， both beam-shell hybrid and full-solid finite element models were established by using ANSYS software. With the established models， the influence from boundary conditions and bolt preloads at the flange-/hoisting- structure to the system dynamic characteristics was analyzed， and corresponding numerical results were compared with experimental results. The results indicated that the finite element model established can accurately simulate the contact pressure and its distribution at the bolted interface. On the premise of guaranteeing computational accuracy， the beam-shell hybrid model was more efficient than the full-solid model. The bolt preloads at the flange had a significant effect on the fifth to eighth natural frequencies of the system， while that at the hoisting structure had a great effect on the first three natural frequencies of the system.

Key words: bolted connection, suspension, thin-walled cylindrical shell, natural characteristic, preload

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