平板在组合载荷作用下的极限强度预报的一种简化解析法

船体平板强度在船舶结构极限强度分析中起到十分重要的作用。最近几年，一些作者提出了计算平板极限强度的一种简化解析方法。但绝大部分的研究只考虑了平板纵向受压这一种简单载荷的情况。在我们成功地解决了三向组合载荷(纵、横压缩和垂向均布压力)的基础上，在本文中，我们又进一步将此方法推广到包含面内剪力在内的所有组合载荷分量均存在的一般情况。通过与一些规范公式的比较表明，本文所推导的公式是可以比较精确地预报平板在一般组合载荷作用下的极限强度。这一工作一方面可以为规范中的一些经验公式提供理论依据，另一方面也许可以提供比经验公式更好的外插能力。为了简化使用本文的方法，本文也在大量参数系列计算的基础上给出了一个回归的经验公式。

A Simplified Analytical Method to Predict the Ultimate Strength of Unstiffened Plates Under Combined Loading Including Edge Shear

Strength of ship plates plays a significant role for the ultimate strength analysis of ship structures. In recent years several authors have proposed simplified analytical methods to calculate the ultimate strength of unstiffened plates.The majority of these investigations deal with plates subjected to longitudinal compression only. Based on the previous success in dealing with the combined loads of longitudinal compression,transverse compression and lateral pressure,in this paper, the simplified analytical method is further generalized to deal with the most general combined loads including edge shear.The obtained results indicate that this approach can predict the ultimate strength of unstiffened plates with sufficient accuracy for practical applications in design.This may provide a theoretical basis for the existing empirical formulas and provide a better means for extrapolation than the empirical formulas.For the ease of application of the present results,an empirical formula is also provided based on the curve-fitting to the large amount of calculations.