The effect of beam inclination on the performance of a passive vibration isolator using buckled beams

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Mori, H.^1 ; Waters, T.^2 ; Saotome, N.^3 ; Nagamine, T.^3 ; Sato, Y.^3

Department of Mechanical Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka

819-0395, Japan^1

Institute of Sound and Vibration Research, University of Southampton, Southampton

SO17 1BJ, United Kingdom^2

Department of Mechanical Engineering, Saitama University, Shimo-Okubo 255, Sakura-ku, Saitama

338-8570, Japan^3

关键词: Beam inclination;    Experimental system;    Isolation performance;    Passive vibration isolator;    Resonance frequencies;    Static stiffness;    Stiffness characteristics;    Vibration isolators;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012229/pdf
DOI  :  10.1088/1742-6596/744/1/012229

来源: IOP

【 摘 要 】

Passive vibration isolators are desired to have both high static stiffness to support large static load and low local stiffness to reduce the displacement transmissibility at frequencies greater than resonance. Utilization of a vertical buckled beam as a spring component is one way to realize such a stiffness characteristic since it exhibits a smaller ratio of local stiffness to static stiffness than that of a linear spring. This paper investigates the behaviour of a vibration isolator using inclined beams as well as vertical ones and examines the effect of beam inclination for the purpose of improving the isolation performance. The experimental system investigated has an isolated mass which is supported by a combination of two types of beams: buckled beams and constraining beams. The buckled beams can be inclined from the vertical by attachment devices, and the constraining beams are employed to prevent off-axis motion of the isolated mass. The results demonstrate that the inclination of the buckled beams reduces the resonance frequency and improves the displacement transmissibility at frequencies greater than resonance.