郭勤涛

副教授 硕士生导师

个人信息

招生学科专业:
机械工程 -- 【招收硕士研究生】 -- 机电学院
航空宇航科学与技术 -- 【招收硕士研究生】 -- 机电学院
机械 -- 【招收硕士研究生】 -- 机电学院
学位:工学博士学位
性别:男
学历:南京航空航天大学
所在单位:机电学院
电子邮箱:

Model-Based Identification of Bolt Looseness

发表时间:2020-03-23 点击次数:
所属单位:机电学院
发表刊物:Zhendong Ceshi Yu Zhenduan
摘要:A new two stages method for on-line identification of bolt state is proposed based on the existing model damage identification technology. The first stage to identify whether there is a torque in bolt connection is reduced, at the same time a new damage index based on modal strain energy is set up, and bolt looseness in the nonlinear performance is discussed. The purpose of the second stage is to identify the residual torque, the equivalent stiffness of bolted connection is identified by a sensitivity-based updating based on the first 3 order modes, and the relationship between the residual torque and the equivalent stiffness is established. Finally, under laboratory conditions, two rectangular steel plates connected by bolts are used as the experimental object, the looseness of the bolts is represented by changing the relative residual stress. The results show that the purposed method can be used to identify the happening of torque reduction, and estimate whether the residual torque value is lower than the limit value. © 2019, Editorial Department of JVMD. All right reserved.
ISSN号:1004-6801
是否译文:
发表时间:2019-04-01
合写作者:Wang, Zibin,Zhan, Ming
通讯作者:郭勤涛
发表时间:2019-04-01

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