This paper theoretically analyzes the critical force in metal hoisting boom structure of lattice type and variable section.
本文对格构式变截面吊臂金属结构的临界力计算作了理论分析。
Considering the boom cross section as a whole, a parametric finite element model and a parametric optimization model for local stability calculation of a boom structure were established.
将吊臂截面作为整体考虑，建立了吊臂结构局部稳定性计算的参数化有限元模型和参数优化模型。
Taking a boom with box section as an example, this paper introduces some accessorial methods that are different to the routine welding technique.
以箱形截面吊臂为例，介绍其焊接工艺及焊接前后的辅助处理方法。
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