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Similar Design of Telescopic Boom Section of Truck Crane

机译：汽车起重机伸缩臂部分的相似设计

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The multi-section telescopic boom is widely used in truck crane as its working boom. At present, the design of telescopic booms relies on experience and lacks the theory and method of custom design. The design difficulty of the telescopic boom is reasonably determined in the section parameters, which determines the performance and self-weight of the telescopic boom. Based on the similarity theory, this paper uses the dimensional analysis method to derive the similarity criterion of the telescopic boom model and the ratio of similitude between the design model and the prototype physical quantity. Considering the actual processing rationality requirements, the equivalent moment of the custom model's section moment of inertia is calculated and the model section size parameters are determined according to the section design law. Finally, a cross-shaped parameter of a 50-ton telescopic boom model was custom designed with a hexagonal section telescopic boom of a 25-ton truck crane as a similar prototype. The results show that the custom model and the existing 50 tons of products have similar performance in terms of strength, stiffness and stability, which provides a feasible method for the customized and serial design of the telescopic boom of the truck crane.
机译：多工位伸缩臂作为工作臂广泛用于汽车起重机。目前，伸缩臂的设计依靠经验，缺乏定制设计的理论和方法。伸缩臂的设计难度在截面参数中得到合理确定，这些参数决定了伸缩臂的性能和自重。基于相似理论，本文采用尺寸分析方法，得出了伸缩臂模型的相似准则以及设计模型与原型物理量之间的相似比。考虑到实际加工的合理性要求，计算定制模型截面惯性矩的当量矩，并根据截面设计定律确定模型截面尺寸参数。最终，定制了50吨伸缩臂模型的十字形参数，并使用25吨卡车起重机的六角截面伸缩臂作为类似原型。结果表明，该定制模型与现有的50吨产品在强度，刚度和稳定性方面具有相似的性能，为卡车起重机伸缩臂的定制和批量设计提供了一种可行的方法。

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