Vibration reduction of a structure by using nonlinear tuned vibration absorbers

Date

2021-01-01

Author

Dogan, Muhammed Emin
Ciğeroğlu, Ender

Metadata

Show full item record

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

Item Usage Stats

225
views

0
downloads

Tuned Vibration Absorbers (TVA) are commonly used in reducing undesirable vibrations of mechanical structures. However, TVAs work in a very limited frequency range and if the excitation frequency is outside of this range, they become ineffective. In order to solve this problem, researchers started to consider nonlinear TVAs for vibration attenuation. In this study, dynamic behavior of a linear Euler-Bernoulli beam coupled with a nonlinear TVA is investigated. The system is subjected to sinusoidal base excitation. Parameters of the nonlinear TVA is optimized to minimize vibration amplitudes of the primary system. Assumed modes method is used to model the Euler-Bernoulli beam. Nonlinear differential equations of motion are converted to a set of nonlinear algebraic equations by using Harmonic Balance Method (HBM). The resulting set of nonlinear algebraic equations is solved by Newton’s Method with Arc-Length continuation. Nonlinearities used in the TVA are cubic stiffness, cubic damping and dry friction damping. Hill’s method is used to evaluate stability of the solutions obtained. Results of the system with optimum nonlinear TVAs are compared with that of optimum linear TVA. Although, NES show to exhibit good vibration reduction performance – which is in parallel with the results given in literature, due to instability of the frequency domain solutions, it is observed that, actually, it is not as effective as other nonlinear TVAs.

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85091580697&origin=inward
https://hdl.handle.net/11511/90873

DOI

https://doi.org/10.1007/978-3-030-47626-7_34

Conference Name

38th IMAC, A Conference and Exposition on Structural Dynamics, 2020

Collections

Department of Mechanical Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Vibration reduction of structures by using nonlinear tuned vibration absorbers Doğan, Muhammed Emin; Ciğeroğlu, Ender; Department of Mechanical Engineering (2019) Tuned Vibration Absorbers (TVA) are commonly used in reducing undesirable vibrations of mechanical structures. However, TVAs work in a very limited frequency range and if the excitation frequency is outside of this range, they become ineffective. In order to solve this problem, researchers started to consider nonlinear TVAs for vibration attenuation. In this study, dynamic behavior of a Linear systems coupled with a nonlinear TVA is investigated. The system is subjected to sinusoidal base excitation. Parame...
Vibration reduction by using two tuned mass dampers with dry friction damping Doğan, Muhammed Emin; Ciğeroğlu, Ender (null; 2019-02-20) Vibration reduction of a single-degree-of-freedom system connected to two tuned mass dampers (TMDs) equipped with dry friction dampers is considered in this work. The system is subjected to sinusoidal base excitation. Parameters of TMDs are optimized to minimize the peak values of the response of the primary system. Harmonic balance method (HBM) is used to obtain the steady state solution of the three-degrees-of-freedom nonlinear system in frequency domain. Newton’s method with arc length continuation is ut...
Fatigue life estimation of tuned vibration absorbers with response estimation method Yılmaz, Yunus; Özgen, Gökhan Osman; Department of Mechanical Engineering (2022-5-24) Tuned Vibration Absorbers are designed and used in applications where any unwanted vibration is needed to be elimination from a vibrating system. In order to accomplish that goal TVAs are needed to be designed to absorb vibrational energy on its own at a specified frequency. Since the energy is absorbed from main system to the TVA, this energy will cause high vibration levels on the TVA. Due to the excessive vibration that occurs on the TVA, vibrational fatigue life is a concern for TVA design. Vibrational ...
Frequency domain non-linear modelling and analysis of liquid filled column dampers Kızılay, Hazım Sefa; Ciğeroğlu, Ender (Springer, Cham; 2019-02-20) Tuned liquid column dampers (TLCDs) have an extensive usage as an effective vibration absorber to enhance the structure response under the effect of seismic or wind loads. In this study, parameter optimization of nonlinear model of a TLCD in frequency domain under harmonic excitation is proposed in order to improve performance of TLCDs. The non-linearity in the model is due to the head-loss caused by the orifice resulting in velocity squared damping. A 6-story building with a TLCD is considered as a case st...
Chatter detection using vibrational and acoustic emissions in turning process Süleyman, Büyükkoçak; Kılıç, Şener; Özer, Mehmet Bülent; Ünver, Hakkı Özgür (null; 2013-09-20) Chatter vibration is a longstanding problem for machining industry. It lowers both surface finish quality and life of cutting tool. In this study, real time chatter vibration detection system is designed and tested experimentally. A traditional lathe, equipped with two accelerometers placed on cutting tool in two orthogonal coordinates and a microphone, is used for machining a steel rod in face turning operation. During cutting process analog data of accelerometers and microphone is acquired by data acquisi...

Citation Formats

M. E. Dogan and E. Ciğeroğlu, “Vibration reduction of a structure by using nonlinear tuned vibration absorbers,” presented at the 38th IMAC, A Conference and Exposition on Structural Dynamics, 2020, Texas, Amerika Birleşik Devletleri, 2021, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85091580697&origin=inward.