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众所周知,与其他因素相比焊接引起的初始挠曲会极大地影响被焊板的极限强度,这意味着在计算板的极限强度以前判别板的初始挠曲性状是极其重要的。本文旨在研究海洋工程中应用的铝板在焊接过程中产生的初始挠曲特性。研究中共有78个单跨和多跨加劲平板铝结构,其与80m长全铝制高速船的基础结构同尺寸,采用金属惰性气体焊接。然后计算出加劲肋之间的初始挠曲。通过对数据库进行统计分析,得到初始挠曲变化系数。研究结果有助于焊接铝板结构的可靠性分析、极限强度确定和制作工艺控制。
It is well-known that the initial deflection due to welding can greatly affect the ultimate strength of the welded plate compared to other factors, which means that it is extremely important to determine the initial flexural behavior of the plate before calculating the ultimate strength of the plate. This paper aims to study the initial flexural properties of aluminum plates used in offshore engineering during the welding process. A total of 78 single-span and multi-span stiffened flat aluminum structures were used in the study, the same size as the basic structure of the 80-meter-long all-aluminum high-speed craft, using metal inert gas welding. Then calculate the initial deflection between the stiffeners. Through the statistical analysis of the database, the initial deflection coefficient is obtained. The results contribute to the reliability analysis of welded aluminum structures, ultimate strength determination and fabrication process control.