螺栓联接蠕变松弛有限元分析  

Finite Element Analysis of the Creep Relaxation of Bolted Joint

作　　者：徐浩[1] 王崴[1] 马跃[1] 

机构地区：[1]空军工程大学防空反导学院,陕西西安710051

出　　处：《机械设计与制造》2013年第9期39-41,45,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金(51075395)

摘　　要：针对目前研究中缺乏考虑粗糙表面对螺栓联接蠕变松弛的影响,利用APDL语言建立螺栓联接二维轴对称有限元模型进行FEA仿真,分析粗糙表面和初始预紧力对螺栓联接蠕变松弛的影响,研究螺栓和联接物蠕变对螺栓联接蠕变松弛的作用。研究结果表明:考虑粗糙表面的螺栓蠕变松弛比没有粗糙结合面的稍小;初始预紧力越大,螺栓蠕变预紧力损失越多,但保持的预紧力也越大;螺栓蠕变对螺栓联接蠕变松弛起主要作用;螺栓联接蠕变松弛并不是螺栓蠕变和联接物蠕变的线性叠加。研究结果对研究螺栓联接松弛机理和防松以及螺栓拧紧工艺具有一定的指导意义。Aiming at defwiency of consideration about rough surface in analyzing the creep relaxation mechanism of bolted joint, a planar symmetry model was built with the application of APDL, and the FEA emulation was conducted to analyze the impact of the rough surface and the initial preload to the creep relaxation of bolted joint, and the effect of bolt creep and connection objects creep on the creep relaxation of bolted joint was also studied. The study showed that the creep relaxation of bolted joint was less with consideration about rough surface; the greater initial preload was, the more preload loss was, but the greater residue preload was; bolt creep played a main role in the creep relaxation of bolted joint; the creep relaxation of bolted joint was not equal to the linear additive result of bait creep and connection objects creep. These were of guiding significance for the research on the creep relaxation mechanism of bolted joint and bolts tightening process.

关 键 词：螺栓联接 蠕变 ANSYS 预紧力 

分 类 号：TK413.32[动力工程及工程热物理—动力机械及工程]