Abstract
As the main bearing force component of the crane, whose carrying capacity directly affects the lifting capacity. The crane boom is a typical truss structure, and the local stability is one of the main mechanical problems that limit the carrying capacity of the lattice boom. The influence of chords and braces sizes on the buckling critical load is analyzed by finite element, and the relationship between the length factor and chords and braces is further determined. The theoretical analysis combined with the finite element method is used to discuss the influence of the main chords and braces sizes, initial imperfections, and the number of spans on the buckling instability of the boom. The analysis results can provide a reference for the design. The well-matched section size of chords and braces can improve the buckling resistance of the lattice boom, which is beneficial to the lightweight.
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