Determination of Nonlinear Joint Forces and Nonlinear Identification of Jointed Connections Using FRFs

Date

2023-01-01

Author

Soleimani, Hossein
Ciğeroğlu, Ender
Özgüven, Hasan Nevzat

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

222
views

0
downloads

The Author(s), under exclusive license to Springer Nature Switzerland AG.Identification and modeling of joint dynamics is an important issue in the dynamic modeling of structures with joints. Moreover, structures connected by joints may show nonlinear behavior due to the existence of dry friction between the connected elements, especially at higher levels of vibration. Therefore, nonlinear identification of joints and parameterization of them is a necessary step in the dynamic analysis of structures. In this study, a new method is proposed for the identification of nonlinear joint forces as functions of relative responses in the frequency domain, which are used to model joint dynamics. In the proposed method, nonlinear joint forces are calculated by using both the measured nonlinear frequency responses of the system, and the calculated or measured linear frequency response functions (FRFs) of the substructures or calculated linear FRFs of the coupled structure at certain points by using estimated values for linear joint parameters. It is important to note that the proposed method does not require measurements at the connection DOFs, which is an advantage since it is generally not practical to make measurements at joints. To demonstrate the performance of the identification method proposed, as well as its sensitivity to measurement errors, two lumped parameter systems connected to each other by nonlinear elements are considered. In these case studies, simulated results representing experimental measurements are used. It is observed that the proposed method is robust to measurement noise, and nonlinear parameters of the connection can be identified accurately.

Subject Keywords

Friction, Joint identification, Nonlinear dynamics

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85135788815&origin=inward
https://hdl.handle.net/11511/101711

DOI

https://doi.org/10.1007/978-3-031-05405-1_7

Conference Name

40th IMAC, A Conference and Exposition on Structural Dynamics, 2022

Collections

Department of Mechanical Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Analysis of the energy justice in natural gas distribution with Multiscale Geographically Weighted Regression (MGWR) Şenyel Kürkçüoğlu, Müzeyyen Anıl (2023-12-01) The Author(s)Energy justice is violated when particular customers and locations are excluded from a variety of urban energy service distribution. This study explores energy justice in terms of natural gas distribution by providing empirical evidence from 356 neighborhoods of Izmir Metropolitan Area (IMA). The aim is to reveal driving factors of natural gas investment and the spatial reflections of the relationships between investment, and socio-economic and physical characteristics. A global regression mode...
Compatibility of the dimensional reduction and variation procedures for a quadratic curvature model with a Kaluza–Klein Ansatz Başkal, Sibel; Çelik, Sinan (2022-10-01) The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.The introduction of extra dimensions is an invaluable strategy for the unification of gravity with other physical fields. Nevertheless, the matter in hand is to be eventually reduced to the actual 4D spacetime. The Kaluza–Klein theory is no exception to this well-known scheme. There are two procedures to obtain the field equations from a higher dimensional action. One can either take the variation of the ...
NekRS, a GPU-accelerated spectral element Navier–Stokes solver Fischer, Paul; Kerkemeier, Stefan; Min, Misun; Lan, Yu-Hsiang; Phillips, Malachi; Rathnayake, Thilina; Merzari, Elia; Tomboulides, Ananias; Karakuş, Ali; Chalmers, Noel; Warburton, Tim (2022-12-01) The Author(s)The development of NekRS, a GPU-oriented thermal-fluids simulation code based on the spectral element method (SEM) is described. For performance portability, the code is based on the open concurrent compute abstraction and leverages scalable developments in the SEM code Nek5000 and in libParanumal, which is a library of high-performance kernels for high-order discretizations and PDE-based miniapps. Critical performance sections of the Navier–Stokes time advancement are addressed. Performance re...
Impact of Self-Orientations and Work-Context-Related Variables on the Well-Being of Public- and Private-Sector Turkish Employees İmamoğlu, Emine Olcay; Beydogan, Basak (2011-01-01) The authors (a) explored the impact of individual differences in self-orientations (i.e., relatedness and individuation) of 383 Turkish public- and private-sector employees on their basic need satisfaction at work and their well-being (i.e., life satisfaction and psychological well-being); (b) considered differences in perceived autonomy- and relatedness-supportiveness of the work contexts; and (c) tested a model in which the relationship between self-orientations and well-being is partially mediated by the...
Assessment of performance of horizontal drains in an open pit mine in eastern Turkey Argunhan Atalay, Çidem; Yazıcıgil, Hasan (2021-02-01) © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.Prediction of spatial distribution of pore-water pressure and its control are the main issues in open pit mines, since excess pore-water pressure is one of the main causes of slope instability. Horizontal drains are commonly used to relieve the excess pore-water pressure as a method of slope stabilization. This paper presents the efficacy of horizontal drains along two cross-sections in an open pit mine locate...

Citation Formats

H. Soleimani, E. Ciğeroğlu, and H. N. Özgüven, “Determination of Nonlinear Joint Forces and Nonlinear Identification of Jointed Connections Using FRFs,” presented at the 40th IMAC, A Conference and Exposition on Structural Dynamics, 2022, Florida, Amerika Birleşik Devletleri, 2023, Accessed: 00, 2023. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85135788815&origin=inward.