摘要
利用变形微分方程,对弹性约束悬臂压弯梁的稳定性进行分析,给出了其临界载荷的精确计算式和实用近似计算式,推导了弹性约束悬臂压弯梁约束端二阶弯矩的精确计算式,并讨论了《塔式起重机设计规范》中的非弹性约束压弯梁的最大二阶弯矩近似计算式在考虑了约束端弹性时的适用性。
By means of deformational differential equation, the paper analyzes stability of cantilever beam with elastic constraints and gives the exact and practical approximate formulas for critical force. It also derives exact formula for second- order moment at the elastic constraint end of cantilever beam. In the end it discusses the scope of application of approximate formula for maximal second - order moment of non - elastic constraint cantilever beam in ＂The Tower Crane Design Standard＂ while considering the constraint elasticity.
出处
《起重运输机械》
北大核心
2006年第10期11-13,共3页
Hoisting and Conveying Machinery
关键词
弹性约束
悬臂梁
稳定性
二阶弯矩
elastic constraint
cantilever beam
stability
second-order moment
