Identification of a Loose Joint in a Bolt-Connected Assembly

摘要

A method for experimentally determining the existence of a loose bolted joint is proposed. An experimental study of the forced vibration response of an aluminum bar with several steel masses attached by bolted connections is described. The bar is soft supported to simulate free-free boundary conditions and is excited by an electrodynamic shaker. The driving force and driving point acceleration are measured. The effect of one or more loose joint(s) is investigated in terms of the dynamic response of the structure. 14 refs., 6 figs. (ERA citation 13:034531)