Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
A Novel Approach for Local Structural Modification of Nonlinear Structures
Date
2024-01-01
Author
Ceren Ekinci, E.
Bülent Özer, M.
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
98
views
0
downloads
Cite This
Structural modification methods provide powerful tools to calculate the dynamic behavior of a modified structure from that of the original one. In general, either the modal properties or responses of the original structure are used to calculate the responses of the modified system. These methods reduce the computational efforts drastically compared to a complete system re-analysis, especially when the modification is local. However, such methods do not apply to nonlinear systems due to response-dependent nature of the frequency response functions (FRFs). One of these methods for linear systems, called the “matrix inversion method,” uses the FRFs of the original structure and the spatial properties of the modification to estimate the FRFs of the modified system. Recently, a new method utilizing the response-controlled step-sine testing (RCT) approach was proposed for obtaining the quasi-linear FRFs and response-dependent modal properties of nonlinear structural systems. Full-duality between the quasi-linear constant amplitude FRFs and the nonlinear constant force FRFs was shown around the nonlinear structure’s resonance frequencies. In this chapter, a novel structural modification approach is proposed, which utilizes the matrix inversion method (so far used to modify only linear systems) and the RCT-based quasi-linear FRFs of the nonlinear structure. This approach enables obtaining the modified structure’s quasi-linear FRFs, similar to the linear system structural modification problem. Combining the matrix inversion method for linear systems with the RCT approach enables the efficient calculation of receptances of structures with local nonlinearities placed around response-controlled degree of freedom, or when the modifications are such that the mode shapes do not change significantly, even if the nonlinearity is distributed.
Subject Keywords
Modified system response
,
Nonlinear structural modification
,
Response-controlled step-sine testing
,
Structural nonlinear re-analysis
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85175964779&origin=inward
https://hdl.handle.net/11511/107929
DOI
https://doi.org/10.1007/978-3-031-36999-5_20
Conference Name
41st IMAC, A Conference and Exposition on Structural Dynamics, 2023
Collections
Department of Mechanical Engineering, Conference / Seminar
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
E. Ceren Ekinci, M. Bülent Özer, and H. N. Özgüven, “A Novel Approach for Local Structural Modification of Nonlinear Structures,” presented at the 41st IMAC, A Conference and Exposition on Structural Dynamics, 2023, Austin, Amerika Birleşik Devletleri, 2024, Accessed: 00, 2024. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85175964779&origin=inward.