ボルト締結体の振動特性評価と接触面剛性を考慮した有限要素解析(機械要素,潤滑,工作,生産管理など)

概要

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Evaluation of the natural frequency and the natural mode of vibration of a bolted joint is particularly important to avoid the failure of the structure due to the resonance. The vibration characteristics of a bolted joint are largely influenced by such factors as the surface roughness of contact surfaces, the magnitude of axial bolt force, the arrangement of clamping bolts, etc. In this paper, natural frequencies of the bending vibration of a bolted joint with simple configuration are measured using strain gages mounted on the surface of test specimen, and the effects of surface roughness, axial bolt force and the bolt location are systematically investigated. Then, a numerical procedure is proposed to analyze the free vibration problem of a bolted joint, where the effects of interface stiffness due to surface roughness are incorporated into the finite element formulation. It is also presented that the computation efficiency for solving the eigen value problem concerned can be fairly improved by introducing selective reduced integration (SRI) scheme. The effectiveness of the numerical procedure proposed here is validated by experimental measurements of the natural frequencies of the first mode.
社団法人日本機械学会の論文
2007-10-25