本文在综合现有结构稳定性研究成果的基础上，结合起重机臂架实例，对细长结构的稳定性进行了研究。
Based on the existing research results of structural stability, stability of slender structure is studied in this paper with the actual example of crane boom.
单臂架门座式起重机结构简单、起重量大自重轻。
Simple arm frame gantry crane structure, lifting large light weight.
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。
Boom crane often has a boom with varying cross section. Boom weight, its construction and main dimension significantly affects the crane performance.
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。
Boom crane often has a boom with varying cross section. Boom weight, its construction and main dimension significantly affects the crane performance.
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