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Enhanced Deterministic Performance of Panels Using Stochastic Variations of Geometric and Material Parameters

机译:使用几何和材料参数的随机变化增强面板的确定性性能

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The effect on structural performance of stochastic variation in material and geometric properties is important for robust design. Knowledge of such effects can be acquired by applying variation patterns to a structure using stochastic fields through a Monte Carlo analysis. The output is post-processed to show the correlation field between the stochastic variation of a structural property and a chosen mechanical response measure. The resulting patterns are used to identify areas most susceptible to variations, as well as areas which have the most potential to increase structural performance by varying the material parameter or geometry. This method is demonstrated on a flat plate and curved panel, by either varying the Young's modulus, or thickness of the structure to increase the linear buckling load. In both of these variations the average property is set to remain the same as the original structure. Applying the redistribution increased the linear buckling load by 9-42%.
机译:材料和几何特性的随机变化对结构性能的影响对于稳健设计很重要。通过使用随机场通过蒙特卡洛分析将变化模式应用于结构,可以获取有关此类影响的知识。对输出进行后处理,以显示结构特性的随机变化与所选机械响应度量之间的相关字段。生成的图案用于识别最容易发生变化的区域,以及最有可能通过更改材料参数或几何形状来提高结构性能的区域。通过改变杨氏模量或结构厚度以增加线性屈曲载荷,可以在平板和弯曲面板上演示该方法。在这两种变化中,平均属性设置为与原始结构相同。应用重新分配使线性屈曲载荷增加了9-42%。

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