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首页> 外文会议>International Conference on Advances in Construction Machinery and Vehicle Engineering >Precise Theoretical Solution of Euler's Critical Load for Crane Telescopic Boom with Cylinder Supporting
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Precise Theoretical Solution of Euler's Critical Load for Crane Telescopic Boom with Cylinder Supporting

机译：欧拉伸缩臂螺旋锚杆锚杆临界负荷的精确理论解

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摘要

Crane telescopic boom is made up of many tapered box sections which can axially slip relatively, only the boom is subject to bending moment, while supporting cylinder in boom bears axial force, therefore, its mechanical model cannot be equivalent to tapered stepped column's. Precise theoretical solution of Euler's critical load at out-of-lifting-plane for crane multi-telescopic-boom with cylinder supporting is provided, and then compared with results of Euler's critical load from different models which neglect the effect of cylinder's supporting. The result of analysis indicates, Euler's critical load of the model considering the effect of supporting cylinder is greater than those neglecting it. In the previous design rules for cranes national standards of People's Republic of China, the mechanical model to calculate crane multi-telescopic-boom's, stability is tapered stepped column neglecting the effect of supporting cylinder, thus the result generally incline to safety.
机译：起重机伸缩悬臂由许多锥形箱部分组成，可以轴向滑动相对，只有臂间受到弯矩的影响，同时支撑动臂的圆柱体承受轴向力，因此，其机械模型不能等同于锥形阶梯柱。提供精确的理论解法欧拉突出平面的临界负载，用于带圆柱支撑的起重机多伸缩臂的伸出平面，然后与欧莱尔的临界负荷的结果相比，不同型号忽略了气缸的支撑效果。分析结果表明，欧拉考虑到支撑缸的效果的模型的临界负荷大于忽略它的效果。在先前的起重机的设计规则中，中华人民共和国的国家标准，机械模型计算起重机多伸缩臂，稳定性是逐渐逐渐逐渐忽略支撑气缸的效果，因此结果一般倾向于安全。

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