Explicit form of an implicit method for inverse force identification

Liu, K; Law, SS; Zhu, XQ; Xia, Y

Explicit form of an implicit method for inverse force identification

Liu, K Law, SS Zhu, XQ Xia, Y

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Publisher:: ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Journal of Sound and Vibration, 2014, 333, (3), pp. 730-744
Issue Date:: 2014-02-03

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Field	Value	Language
dc.contributor.author	Liu, K
dc.contributor.author	Law, SS
dc.contributor.author	Zhu, XQ
dc.contributor.author	Xia, Y
dc.date.accessioned	2023-03-27T21:49:09Z
dc.date.available	2023-03-27T21:49:09Z
dc.date.issued	2014-02-03
dc.identifier.citation	Journal of Sound and Vibration, 2014, 333, (3), pp. 730-744
dc.identifier.issn	0022-460X
dc.identifier.issn	1095-8568
dc.identifier.uri	http://hdl.handle.net/10453/168623
dc.description.abstract	Most existing time domain force identification methods are based on the state space method, which has the disadvantage of large discretization error with a low sampling frequency or a long sampling duration. This work transforms the conventional implicit Newmark-β algorithm into an explicit form for the solution of the Ax=b equations, which is an equivalent transformation, and it exhibits the same characteristics of Newmark-β algorithm as an implicit method. The accuracy of this method for the dynamic force identification is illustrated with two shear-frame buildings and a planar truss structure. Numerical results are compared with reference analytical responses. The new method gives more accurate identified force time histories compared with those from the conventional state space method for multiple sinusoidal and white noise excitations with 10% measurement noise in the responses. © 2013 Elsevier Ltd.
dc.language	English
dc.publisher	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
dc.relation.ispartof	Journal of Sound and Vibration
dc.relation.isbasedon	10.1016/j.jsv.2013.09.040
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	02 Physical Sciences, 09 Engineering
dc.subject.classification	Acoustics
dc.title	Explicit form of an implicit method for inverse force identification
dc.type	Journal Article
utslib.citation.volume	333
utslib.for	02 Physical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2023-03-27T21:49:08Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	333
utslib.citation.issue	3

Abstract:

Most existing time domain force identification methods are based on the state space method, which has the disadvantage of large discretization error with a low sampling frequency or a long sampling duration. This work transforms the conventional implicit Newmark-β algorithm into an explicit form for the solution of the Ax=b equations, which is an equivalent transformation, and it exhibits the same characteristics of Newmark-β algorithm as an implicit method. The accuracy of this method for the dynamic force identification is illustrated with two shear-frame buildings and a planar truss structure. Numerical results are compared with reference analytical responses. The new method gives more accurate identified force time histories compared with those from the conventional state space method for multiple sinusoidal and white noise excitations with 10% measurement noise in the responses. © 2013 Elsevier Ltd.

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http://hdl.handle.net/10453/168623