起重机变截面臂架屈曲计算

Study on buckling of varying cross section boom of crane

臂架式起重机常采用变截面的臂架,臂架的自重、结构型式与主要尺寸对起重机的性能有重要的影响。本文以管形变截面臂架为例,证明用能量法求臂架的屈曲载荷相当准确。

Boom crane often has a boom with varying cross section. Boom weight, its construction and main dimension significantly affects the crane performance. Present paper takes a tubular boom as an example to prove that it is precise enough to use energy method to find buckling load of a boom.