螺栓接头非线性模型及其波能耗散  

Nonlinear Model of Bolted Joint and Its Wave Energy Dissipation

作　　者：李以农[1] 郑玲[1] 闻邦椿[2] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044 [2]东北大学机械工程与自动化学院,沈阳110006

出　　处：《振动工程学报》2003年第2期137-142,共6页Journal of Vibration Engineering

基　　金：重庆大学骨干教师基金资助项目

摘　　要：建立了在高频情况下一维构件的波传播模型 ,针对工程中常见的螺栓连接梁结构 ,讨论了波在其中传播的特性及能量耗散问题 ,提出了一种简化的非线性接头模型。分析与实验结果表明 :这种非线性模型更能接近实际。波通过梁的螺栓连接时 ,存在着能量耗散 ,螺栓松紧程度对能量耗散有较大的影响。在共振频率处 ,连接部分发生较大的折射。In this paper, the model of wave propagation is established at high frequency for one dimensional structure. The characteristic of the wave propagation and energy dissipation is discussed for bolted joints which are the common structure in engineering. A simplified nonlinear joint model is presented. The results of the analysis and experiment show that this nonlinear model is a better approach to the structure. Energy dissipation occurs when the wave passes through the bolted part of a beam. The degree of the looseness and the tightness of the bolts affects the energy dissipation. Strong reflection occurs at a resonance frequency.

关 键 词：螺栓接头 非线性模型 波能耗散 波传播模型 螺栓连接 振动能量 

分 类 号：TH131.3[机械工程—机械制造及自动化] TH113.1