腰绳装置对起重机吊臂起重平面外稳定性的影响  

The effect of auxiliary bracing to the out-of-plane buckling of the crane jib

作　　者：夏拥军[1] 王腾飞[2] 张宏生[2] 

机构地区：[1]中国电力科学研究院,北京100055 [2]哈尔滨工业大学机电工程学院,黑龙江哈尔滨150001

出　　处：《工程设计学报》2015年第4期394-398,共5页Chinese Journal of Engineering Design

摘　　要：采用微分方程法分析了带腰绳起重机吊臂的平面外稳定性.通过吊臂失稳临界状态下的弯曲微分方程,引入边界条件及适当的变形协调方程,得到带腰绳吊臂平面外失稳特征方程的解析表达,算例的计算结果与ANSYS计算结果吻合.随后探讨了失稳特征方程在单拉杆及双拉杆吊臂两种极限情况下的退化形式,并对3种形式臂架的稳定承载能力进行对比.结果表明:带腰绳吊臂稳定承载能力介于单拉杆及双拉杆吊臂之间,腰绳结构在增强吊臂刚度的同时也提高了吊臂的稳定承载能力,且吊臂系统仍为静定结构.An analytical method for the out‐of‐plane buckling of the crane jib with auxiliary brac‐ing was proposed .The analytical expression of the out‐of‐plane buckling characteristic equation w as obtained by establishing the bending deflection differential equation of jib . T he boundary conditions and deformation compatibility equations were introduced to obtain undetermined con‐stants .The calculated results agreed well with that from ANSYS .The degeneration forms of the characteristic equation were explored to the single rod＇s frame and the double rods＇frame .The buckling loads of the jib with auxiliary bracing ,the jibs with single rod and with double rods were compared .The result showed that the buckling load of the jib with auxiliary bracing was between the single rod＇s frame and the double rods＇frame ,and the necessity of the auxiliary bracing was discussed .

关 键 词：平面外稳定性 起重臂 腰绳装置 微分方程法 

分 类 号：TH21[机械工程—机械制造及自动化]