刘中华1,李建福1,孙志航1,柴清东2,马辉2,贾铎3.考虑螺栓连接的航空发动机管路建模及振动特性分析[J].航空发动机,2021,47(6):45-49
考虑螺栓连接的航空发动机管路建模及振动特性分析
Modeling and Analysis of Vibration Characteristics of Aeroengine Pipeline with Bolt Connection
  
DOI:
中文关键词:  管路  卡箍  螺栓连接  动力学特性  航空发动机
英文关键词:pipe  clamp  bolt connection  dynamic characteristics  aeroengine
基金项目:航空动力基础研究项目资助
作者单位E-mail
刘中华1,李建福1,孙志航1,柴清东2,马辉2,贾铎3 1. 空装驻沈阳地区第二军事代表室沈阳1100432. 东北大学机械工程与自动化学院沈阳110819 3. 中国航发沈阳发动机研究所沈阳110015 bilvde2008@163.com 
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中文摘要:
      为了建立考虑真实卡箍结构影响的管路系统动力学模型、获取结构设计参数和装配参数等对管路系统动力学特性的影 响规律,以航空发动机外部管路为研究对象,考虑金属橡胶卡箍螺栓拧紧力矩的影响,基于ANSYS有限元软件建立了包含螺栓连 接的管路模型。通过模态试验及基础激励响应试验验证了有限元模型的准确性。进一步分析了螺栓拧紧力矩、卡箍跨距及管体 长度对双卡箍管路系统固有频率的影响规律。结果表明:拧紧力矩的增大导致管路的固有频率的提高,针对本研究模型,在拧紧 力矩达到8 N·m以后,管路固有频率逐渐趋于稳定;拧紧力矩对不同长度管路的固有频率影响不同,管路越长,拧紧力矩的作用越 弱,即卡箍的支承刚度对管路固有频率的影响越弱。
英文摘要:
      In order to establish the dynamic model of the pipeline system considering the influence of the real clamp structure,and obtain the influence law of the structural design parameters and assembly parameters on the dynamic characteristics of the pipeline system,taking the external pipeline of the aeroengine as the research object,a piping model including bolted connections is established based on ANSYS finite element software. And the influence of the tightening torque of the metal rubber clamp bolts is also considered in this model.The accuracy of the finite element model is verified through modal tests and basic excitation response tests. Furthermore,the influences of bolt tightening torque,clamp span and pipe length on the natural frequency of the double clamp piping system are analyzed. The results show that the increase in the tightening torque leads to an increase in the natural frequency of the pipeline. As far as this model is concerned,after the tightening torque reaches 8 N·m,the natural frequency of the pipeline gradually stabilizes. Moreover,the influence of tightening moment on natural frequency of pipeline of different length is different,the longer the pipeline,the weaker the effect of tightening torque is,in other words,the weaker the influence of the support stiffness of the clamp on the natural frequency of the pipeline.
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