마찰감쇠가 포함된 기저가진 연화스프링 진동계의 변위전달률
Displacement Transmissibility for Base-Excited Softening Spring Vibration Isolator with Frictional Damping
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
This study deals with the vibration transmissibility of a vibration isolation device, which is composed of frictional damping and nonlinear softening springs, when its base is harmonically excited. The SCAP method, a type of averaging method, is employed to obtain steady-state responses. The vibration characteristics due to excitation of the base are investigated through the analysis of displacement transmissibility in the steady-state response. In this process, displacement transmissibility for design parameters is analyzed, and the stability of the response is also investigated. The vibration isolation effect due to frictional damping is found to be more effective in the case of the softening spring than in the case of the hardening spring. Additionally, the pattern of the jump phenomenon observed during frequency sweeping, both upward and downward, has been identified.
Abstract
This study deals with the vibration transmissibility of a vibration isolation device, which is composed of frictional damping and nonlinear softening springs, when its base is harmonically excited. The SCAP method, a type of averaging method, is employed to obtain steady-state responses. The vibration characteristics due to excitation of the base are investigated through the analysis of displacement transmissibility in the steady-state response. In this process, displacement transmissibility for design parameters is analyzed, and the stability of the response is also investigated. The vibration isolation effect due to frictional damping is found to be more effective in the case of the softening spring than in the case of the hardening spring. Additionally, the pattern of the jump phenomenon observed during frequency sweeping, both upward and downward, has been identified.
참고문헌 (9)
- J. H. Lee, "Passive Vibration Isolators", Journal of KSNVE, 27(3), pp.6~9 (2017)
- R. A. Ibrahim, "Recent advances in nonlinear passive vibration isolators", Journal of Sound and Vibration, 314, pp.371~452 (2008)
- Y. h. Shin, "Design of Passive Vibration Isolation Element by Wire Mesh Material for Developing a Hybrid Mount", Trans, of KSNVE, 30(1), pp.75~81 (2020)
- K. W. Min, "Performance based Design of Friction Dampers for Seismically Excited Structures", Journal of the Earthquake Engineering Society of Korea, 7(6), pp.17~24 (2003)
- D. J. Hur, "Analysis of an Isolation System with Vertical Spring-viscous Dampers in Horizontal and Vertical Ground Motion", Applied Science, 10, pp.1141~ (2020)
- B. Ravindra, "Hard Duffing-type Vibration Isolator with Combined Coulomb and Viscous Damping", International Journal of Non-Linear Mechanics, 28(4), pp.427~440 (1993)
- S. C. Hong, "Displacement Transmissibility of Base-Excited Vibration Isolator with Friction Damping", Journal of Korean Society of Mechanical Technology, 23(5), pp.760~766 (2021)
- S. C. Hong, "Displacement Transmissibility of a Base-Excited Two-DOF Nonlinear Vibration System attached a Dynamic Vibration Absorber", Journal of Korean Society of Mechanical Technology, 24(6), pp.1184~1191 (2022)
- P. Hagedorn, "Non-Linear Oscillations" (1981)