一维构件中的波传播模型及其在结点的能量耗散  

Model Wave Propagation and Energy Dissipation in Joints for One Dimensional Structure

作　　者：李以农[1,2] 闻邦椿[1,2] 颜云辉[1,2] 江钟伟[1,2] 长男征二 

机构地区：[1]东北大学机械工程与自动化学院 [2]日本东北大学

出　　处：《东北大学学报（自然科学版）》1999年第3期275-278,共4页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金;日本文部省国际合作项目

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，讨论了波在这种情况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·分析与实践结果表明这种非线性模型更能接近实际，波通过梁的螺栓接部时，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·The model of wave propagation was made at high frequency for one dimensional structure, the characteristic of the wave propagation and energy dissipation were discussed for bolted joints which are common structure in engineering. A simplified nonlinear joint model was presented. The analysis and experiment show that this nonlinear model is closer to fact than linear one. Energy dissipation occurs when the wave passes through the bolted part of a beam. The degree of looseness and tightness of the bolts affects the energy dissipation. Large reflection occurs at resonance frequency.

关 键 词：能量耗散 诊断 一维构件 波传播模型 结点 

分 类 号：TU317[建筑科学—结构工程] TH878[机械工程—仪器科学与技术]