Open AccessThe Best Preload of Bolted Joint Plate for Anti-resonance
Author(s) -
Songjian Wu,
Wenguang Liu,
Xiaoting Wang
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/576/1/012004
Subject(s) - bolted joint , preload , structural engineering , modal , joint (building) , engineering , modal analysis , materials science , finite element method , composite material , medicine , hemodynamics
Based on the problem of modal frequencies variation of bolted joint plate caused by the variation of bolt preloads, the purpose of this article is to propose a method of finding the best preload of bolted joint plate. Firstly, a modal analysis experimental system of bolted joint plates was set up. Subsequently, the modal frequency test of some bolted joint plates are completed. A method for designing the best preload of bolted joint plate was proposed in the end. Results indicate that the bolt preload has certain influence on modal frequency of bolted joint plate. The process of applying a preload to the bolt is regarded as the tightening of a bolt from loosen state to tighten state. As two loosen bolts are simultaneously tightened into tighten bolts, the modal frequencies is increased with a big magnitude. However, as one of loosen bolt is tightened to tighten bolt, but the other is unchanged, the modal frequencies is increased with a small magnitude. The sensitivity of first four modal frequencies of the jointed plate are different to the bolt preload. Therefore, working environment and working force of jointed plate must be considered in the dynamic design. Based on the experimental result, a best bolt preload design method of bolted joint plate in the dynamic design can be proposed.