船体结构中受压矩形板计及残余应力影响的平均应力-平均应变曲线

在用简化方法计算船体的总纵极限弯矩时需要掌握四周支承在骨架上的矩形板包括后屈曲及后崩溃阶段非线性性能在内的完整的平均应力－平均应变关系，采用Ｇｏｒｄｏ和Ｇｕｅｄｅｓ Ｓｏａｒｅｓ提出的利用经验公式的方法导出了受压矩形板的平均应力－平均应变关系，着重讨论了焊接残余应力的影响，在分析板受压时各阶段板内应力分布的基础上，根据静力平衡条件提出了一个生成计及残余应力影响的平均应力－平均应变曲线的近似方法。

Average Stress-Strain Curve with the Effect of Residual Stresses for Compressive Rectangular Plates in Ship Structures

To calculate the ultimate longitudinal bending moment of ship hulls,it is essential to command the average stress strain relationship of the compressive rectangular plates,including the nonlinear post buckling and post collapse behavior.The method proposed by Gordo and Guedes Soares was employed to generate the average stress strain relationship of the compressive rectangular plates by means of the existing empirical formulae. The effect of welding residual stresses was discussed.Based on the investigation into the stress distribution in the plates during different stages of compression,an approximate method to generate the average stress strain curve of compressive rectangular plates with residual stresses was developed by taking into account the condition of static equilibrium.