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工程设计学报
Chinese Journal of Engineering Design  2015, Vol. 22 Issue (5): 394-398    DOI: 10.3785/j.issn. 1006\|754X.2015.04.014
    
The effect of auxiliary bracing to the out-of-plane buckling of the crane jib
XIA Yong-jun1， WANG Teng-fei2， ZHANG Hong-sheng2
1.China Electric Power Research Institute， Beijing 100055， China;
2.School of Mechatronics Engineering， Harbin Institute of Technology， Harbin 150001， China
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Abstract  An analytical method for the out-of-plane buckling of the crane jib with auxiliary bracing was proposed. The analytical expression of the out-of-plane buckling characteristic equation was obtained by establishing the bending deflection differential equation of jib. The boundary conditions and deformation compatibility equations were introduced to obtain undetermined constants. 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．

Key words： out-of-plane buckling      crane jib      auxiliary bracing      method of differential equation     
Received: 15 April 2015     
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Cite this article:

XIA Yong-jun，WANG Teng-fei，ZHANG Hong-sheng. The effect of auxiliary bracing to the out-of-plane buckling of the crane jib. Chinese Journal of Engineering Design, 2015, 22(5): 394-398.

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https://www.zjujournals.com/gcsjxb/10.3785/j.issn. 1006\|754X.2015.04.014     OR     https://www.zjujournals.com/gcsjxb/Y2015/V22/I5/394


腰绳装置对起重机吊臂起重平面外稳定性的影响

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.

关键词： 平面外稳定性,  起重臂,  腰绳装置,  微分方程法 
[1] XIA Yong-jun， WANG Teng-fei， ZHANG Hong-sheng. The effect of auxiliary bracing to the out-of-plane buckling of the crane jib[J]. Chinese Journal of Engineering Design, 2015, 22(4): 394-398.