[논문]이동하중을 받는 보와 가동 기초 위에 설치된 계에의 동흡진기의 이용

이건명; 변재현

doi:10.14775/ksmpe.2015.14.6.027

Abstract ▼ AI-Helper

Dynamic vibration absorbers are widely used in machinery, buildings, and structures, including bridges. Two cases of their usage are considered in this paper. One is a simply supported beam subjected to either a moving force or a sequence of moving forces, which simulates a train-bridge interaction ...

Dynamic vibration absorbers are widely used in machinery, buildings, and structures, including bridges. Two cases of their usage are considered in this paper. One is a simply supported beam subjected to either a moving force or a sequence of moving forces, which simulates a train-bridge interaction problem. The other is a case where a primary system is mounted on a base that is not grounded and is excited by an external force. The conditions that the dynamic vibration absorbers must meet in these cases are found and compared to those for usual cases where bases of primary systems are grounded.

주제어

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문제 정의

If a DVA is attached to a beam to suppress its dynamic responses, the dynamic responses can be hardly obtained analytically. Therefore, a finite element analysis was performed for this case in this paper. The procedure for the analysis was programmed using MATLAB.

가설 설정

A vibration absorber was attached to the beam to reduce the dynamic deflections due to moving forces. First, a single moving force case was considered. The force was set to 10,000 N.

제안 방법

The first theoretical investigation of DVA was carried out by Den Hartog^[2] in 1928. He found the optimal tuning ratio and damping ratio for an auxiliary single-degree-of-freedom (SDOF) mass attached to an undamped SDOF system. Later, SDOF systems with damping were also examined and various tuning rules were proposed.

데이터처리

1. To check the correctness of the programming, the deflections of the beam without an absorber due to a moving force were calculated using a finite element analysis and compared with the results obtained from an analytical analysis. Almost identical results were obtained for both approaches.

이론/모형

Therefore, a finite element analysis was performed for this case in this paper. The procedure for the analysis was programmed using MATLAB.

성능/효과

The responses of the beam with and without an absorber were calculated for various damping ratios of an absorber. From the results it was observed that the vibration amplitudes at the mid-span of the beam increased with the damping ratio of an absorber, and the amplitude was very small when the damping ratio was equal to zero. This phenomenon can be explained by reminding the facts: when a resonance due to a sequence of moving forces occurs in a beam, the mid-span of the beam vibrates with almost a single frequency, and when a SDOF system vibrates with a single frequency, its vibration amplitude can be reduced to zero by using an absorber without damping.

참고문헌 (8)

Kim, G. M. and Choi, S. D., "Analysis of the Reduction of the Dynamic Response for the CNC 5 Axles Machining Center," J. Korean Soc. Manuf. Process Eng., Vol. 9, No. 5, pp. 83-89, 2010.
Den Hartog, J. P., Mechanical Vibrations, McGraw-Hill, 1956.
Yau, J. D. and Yang, Y. B., "A Wideband MDVA System for Reducing the Dynamic Response of Continuous Truss Bridges to Moving Train Loads," Eng. Struct., Vol. 26, pp. 1795-1807, 2004.

상세보기
Chen, S. R. and Wu, J., "Performance Enhancement of Bridge Infrastructure Systems: Long-span Bridge, Moving Trucks and Wind with Tuned Mass Dampers," Eng. Struct., Vol. 30, pp. 3316-3324, 2008.

상세보기
Wang, J. F., Lin, C. C. and Chen, B. L., "Vibrations Suppression for High-speed Railway Bridges Using Tuned Mass Dampers," Int. J. Solids Struct., Vol. 40, pp. 465-491, 2003.

상세보기
Samani, F. S. and Pellicano, F., "Vibration Reduction of Beams under Successive Traveling Loads by Means of Linear and Nonlinear Dynamic Absorbers," J. Sound Vibr., Vol. 331, pp. 2272-2290, 2012.

상세보기
Kwon, H. C., Kim, M. C. and Lee, I. W., "Vibration Control of Bridges under Moving Loads, Comput.Struct., Vol. 66, No. 4, pp. 473-480, 1998.

상세보기
Rao, S. S., Mechanical Vibrations, Pearson Education, Inc., 2004.

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연합인증

이동하중을 받는 보와 가동 기초 위에 설치된 계에의 동흡진기의 이용
Usage of Dynamic Vibration Absorbers for a Beam Subjected to Moving Forces and for a System Mounted on a Moving Base 원문보기

Abstract ▼ AI-Helper

주제어

AI 본문요약
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문제 정의

가설 설정

제안 방법

데이터처리

이론/모형

성능/효과

참고문헌 (8)

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연합인증

이동하중을 받는 보와 가동 기초 위에 설치된 계에의 동흡진기의 이용 Usage of Dynamic Vibration Absorbers for a Beam Subjected to Moving Forces and for a System Mounted on a Moving Base 원문보기

Abstract ▼ AI-Helper

주제어

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문제 정의

가설 설정

제안 방법

데이터처리

이론/모형

성능/효과

참고문헌 (8)

이 논문을 인용한 문헌

저자의 다른 논문 :

이건명 (23) 변재현 (59)

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이동하중을 받는 보와 가동 기초 위에 설치된 계에의 동흡진기의 이용
Usage of Dynamic Vibration Absorbers for a Beam Subjected to Moving Forces and for a System Mounted on a Moving Base 원문보기

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