工程设计学报2017，Vol.24Issue(4)：418-424,7.DOI:10.3785/j.issn.1006-754X.2017.04.008
螺栓与孔间隙对单搭单螺栓连接板模态频率的影响
Impact of bolt-hole clearance on modal frequency of single lapped and single bolted joint plate
摘要
Abstract
It is inevitable that there is clearance between the bolt and the hole of bolted joint plate on account of the need of assemble and manufacture errors .And the changes of clearance have some influence on the modal frequencies of the bolted joint plate .The influence mechanisms of bolt-hole clearance on the modal frequencies of a single lapped and single bolted joint plate system were investigated ,and subsequently a dynamical design method for bolted joint plate system by changing the diameter of through-hole was proposed .Firstly ,the finite element modeling method was proposed by using ABAQUS package and Python language .Thereafter ,a dynamic finite ele-ment model of the bolted joint plate system with variable diameter of through-hole was set up . Then the relation of the bolt-hole clearance and the modal frequencies of bolted joint plate was an-alyzed in two kinds of boundary conditions ,including one end fixed and both ends fixed .Under a typical vibrating frequency band ,the dynamic design method of the bolted joint plate system by changing the diameter of through-hole was discussed in the end .Results indicated that when the diameter of the through-hole was 1 .021 .20 times of the bolt diameter ,the influences of bolt-hole clearance on the modal frequencies of bolted joint plate could be negligible .However ,when the diameter of through-hole was larger than 1 .21 times of bolt diameter ,the effects of bolt-hole clearance on the vibration modal frequencies were obvious and the modal frequencies were muta-tion .The research shows that the modal frequency of system can be changed by changing the bolt-hole clearance in the specific incentive environment ,so as to avoid the structure resonance . The proposed method provides some reference for analyzing the influence of bolt-hole clearance on natural frequency of complex bolted joint system ,and also provides an idea of anti-vibration fatigue design method for the bolted joint system .关键词
螺栓与孔间隙/单搭单螺栓连接板/模态频率Key words
bolt-hole clearance/single lapped and single bolted joint plate/modal frequency分类
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林炜彦,刘文光,颜龙,舒斌..螺栓与孔间隙对单搭单螺栓连接板模态频率的影响[J].工程设计学报,2017,24(4):418-424,7.基金项目
国家自然科学基金资助项目(51565039) （51565039）
