Similar Design of Telescopic Boom Section of Truck Crane

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.