陈怀海
    博士生导师
  • 招生学科专业:
    力学 -- 【招收博士、硕士研究生】 -- 航空学院
    机械 -- 【招收博士、硕士研究生】 -- 航空学院
  • 学位:工学博士学位
  • 职称:教授
  • 所在单位:航空学院
博士生导师
教师英文名称:CHEN Huaihai
电子邮箱:CHHNUAA@nuaa.edu.cn
所在单位:航空学院
学历:大连理工大学
办公地点:A18-613
性别:
联系方式:CHHNUAA@nuaa.edu.cn
毕业院校:西安交通大学

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标题:
Time-domain approach for multi-exciter random environment test
点击次数:
所属单位:
航空学院
发表刊物:
JOURNAL OF SOUND AND VIBRATION
关键字:
Multi-exciter Random environment test State-space method Truncated singular value decomposition Control algorithms
摘要:
This paper presents a time-domain method for multi-exciter random environment tests. Traditional random environment test theory has been formulated in the frequency domain, where an important step is taking the inverse of the frequency response function matrices (FRFMs). The accuracy of this inversion tends to be poor, particularly at frequencies near lightly damped resonances. The currently used control algorithms face difficulties in suppressing abnormal spectral lines caused by this inverse problem. In this paper, traditional formulations of the environment test are reformed, and the time-domain method is adopted; this results in a more precise inverse operation in environment tests. To achieve this, reference spectra are converted into time-domain response signals. The finite long driving signals are derived by the state-space method with estimated state vectors. During the process, the inverse of rank-deficient Toeplitz matrices are stabilized with truncated singular value decomposition (TSVD) to suppress all abnormally high-level components in the driving forces; thus, overall, the spectra lines produced by noise within the frequency band are filtered out. A numerical simulation of a single-axis random vibration test of a cantilever beam is conducted using the traditional frequency-domain procedure (FDP) and the proposed time-domain procedure (TDP). The response spectra generated by both procedures are tested by control algorithms, and the result shows that responses generated by the proposed TDP are more easily controlled. The conditions of stability for both the FDP and the TDP are also determined and introduced in the simulation. Moreover, a multi-axis vibration experiment further validates the effectiveness of the TDP. (C) 2017 Elsevier Ltd. All rights reserved.
ISSN号:
0022-460X
是否译文:
发表时间:
2017-06-23
第一作者:
陈怀海
通讯作者:
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其他作者:
崔嵩,贺旭东
发表时间:
2017-06-23
个人简介:

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参与编著2部教材,主编教材1部,在国内外核心刊物上发表论文100多篇,获省部级2等奖1次、3等奖3次。西安交通大学工程力学系工程力学本科、固体力学硕士,大连理工大学土木工程系水工结构工程博士,南京航空航天大学机械工程博士后流动站博士后,南京航空航天大学副教授、教授、硕士生导师、博士生导师。

研究方向:工程力学

1.振动环境试验控制系统

2.结构振动疲劳

3.有限元建模、模态试验与模型修正

4.结构动力学虚拟试验



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