基于模态理论的大型结构振动预评估
详细信息 查看官网全文
- 英文论文题名：Vibration pre-evaluation of large structures based on the modal theory
- 论文作者：袁兴军 ; 阮竹青 ; 史胜东
- 英文论文作者：YUAN Xing-jun ; RUAN Zhu-qing ; SHI Sheng-dong ; National Key Laboratory on Ship Vibration & Noise ; China Ship Development and Design Center
- 年：2016
- 作者机构：中国舰船研究设计中心船舶振动噪声重点试验室;
- 论文关键词：主汽轮齿轮机组 ; 试验台架 ; 模态 ; 振动 ; 预评估
- 英文论文关键词：the main steam turbine geared unit ; test bench ; modal ; vibration ; pre-assessment
- 会议召开时间：2016-09-17
- 会议录名称：2016年度声学技术学术会议论文集
- 语种：中文
- 分类号：U661.44;U664.113
- 学会代码：SXJS
- 会议名称：2016年度声学技术学术会议
- 会议地点：中国湖北武汉
- 主办单位：船舶振动噪声重点实验室、湖北省声学学会
- 学会名称：《声学技术》编辑部
- 页数：4
- 文件大小：489k
- 原文格式：D
- 会议级别：全国
摘要
本文以主汽轮齿轮机组试验台架为研究对象,通过建立理论计算模型,采用有限元计算方法对试验台进行模态计算分析,而后对试验台进行模态测试,以验证理论模型的正确性,但由于主机刚性安装于试验台后,其重量和刚度特性将附加在试验台上,形成一个新的动力学系统,与未安装主机前相比,试验台的固有频率特性将发生较大变化。对此,通过有限元计算分析主机附加在试验台后的固有频率特性,对比主机激励力特征频率,以达到对主机振动预评估的目的。
Rent test-bed based on the main steam turbine geared unit as the research object, through the theoretical calculation model is established, using the finite element method to calculate the modal calculation analysis was carried out on the test bench, and then modal test was carried out on the test bench, to verify the correctness of the theoretical model. Rigid installed on the test, but due to host its weight and stiffness properties will be attached on the test bench, the formation of a new dynamic system, compared with before install the host, the inherent frequency characteristics of the test bench, the large changes. To this, this article through finite element analysis of host attached to the test after the inherent frequency characteristics, with the host exciting force fruqency analysis, Pre-assessment on the vibration of the main steam turbine geared unit.
Rent test-bed based on the main steam turbine geared unit as the research object, through the theoretical calculation model is established, using the finite element method to calculate the modal calculation analysis was carried out on the test bench, and then modal test was carried out on the test bench, to verify the correctness of the theoretical model. Rigid installed on the test, but due to host its weight and stiffness properties will be attached on the test bench, the formation of a new dynamic system, compared with before install the host, the inherent frequency characteristics of the test bench, the large changes. To this, this article through finite element analysis of host attached to the test after the inherent frequency characteristics, with the host exciting force fruqency analysis, Pre-assessment on the vibration of the main steam turbine geared unit.
引文
[1]张磊.基于分区测量的大型结构模态参数识别方法研究[D].北京:中国舰船研究院,2013.ZHANG Lei.Modal Parameter Identification of Large-scale Structures based on subarea measurements[D].Beijing:China Ship Research and Development Academy,2013.
[2]Chanhan,S.,Martell,R.,Brown,D.L.,Allemang,R.J.,Utilization of Traditional Modal Analysis Algorithms for Ambient Testing[C].Proceeding of 24th International Modal Analysis Conference,St.Louise,MO,2006.
[3]Ewins D.J.,Modal Testing:Theory,Practice and Applications[M],2nd Edition,Research Studies Press,Letchwor,2000.
[4]Craig R.R.,Substructure methods in Vibration[J].ASME Journal of Vibration and Acoustics,1995,117:207-213.
[2]Chanhan,S.,Martell,R.,Brown,D.L.,Allemang,R.J.,Utilization of Traditional Modal Analysis Algorithms for Ambient Testing[C].Proceeding of 24th International Modal Analysis Conference,St.Louise,MO,2006.
[3]Ewins D.J.,Modal Testing:Theory,Practice and Applications[M],2nd Edition,Research Studies Press,Letchwor,2000.
[4]Craig R.R.,Substructure methods in Vibration[J].ASME Journal of Vibration and Acoustics,1995,117:207-213.