Impact damper with granular materials for multibody system

Journal Article · Thu Feb 01 04:00:00 EST 1996 · Journal of Pressure Vessel Technology

DOI:https://doi.org/10.1115/1.2842169· OSTI ID:197594

Yokomichi, I ^[1]; Araki, Y; Jinnouchi, Y ^[2]; Inoue, J ^[3]

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1. Kitakyushu College of Technology (Japan). Dept. of Mechanical Engineering
2. Kyushu Inst. of Technology, Kitakyushu (Japan). Dept. of Mechanical and Control Engineering
3. Nishi-Nippon Inst. of Technology, Miyako, Fukuoka (Japan)

An efficient impact damper consists of a bed of granular materials moving in a container mounted on a multibody vibrating system. This paper deals with the damping characteristics of a multidegree-of-freedom (MDOF) system that is provided with the impact damper when the damper may be applied to any point of the system. In the theoretical analysis, the particle bed is assumed to be a mass which moves unidirectionally in a container, and collides plastically with its end. Equations of motion are developed for an equivalent single-degree-of-freedom (SDOF) system and attached damper mass with use made of the normal mode approach. The modal mass is estimated such that it represents the equivalent mass on the point of maximum displacement in each of the vibrating modes. The mass ratio is modified with the modal vector to include the effect of impact interactions. Results of the analysis are applied to the special case of a three-degree-of-freedom (3DOF) system, and the effects of the damper parameters including mode shapes and damper locations are determined. A digital model is also formulated to simulate the damped motion of the physical system.

• Sponsoring Organization: USDOE
• OSTI ID: 197594
• Journal Information: Journal of Pressure Vessel Technology, Journal Name: Journal of Pressure Vessel Technology Journal Issue: 1 Vol. 118; ISSN 0094-9930; ISSN JPVTAS
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DAMPING
DESIGN
EXPERIMENTAL DATA
IMPACT SHOCK
MECHANICAL STRUCTURES
MECHANICAL VIBRATIONS
PERFORMANCE
SHOCK ABSORBERS
THEORETICAL DATA