Dome thickness prediction of composite pressure vessels
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摘要: 本研究的目的是建立一种用来预测纤维缠绕复合材料压力容器封头厚度的方法。针对固化成型的复合材料压力容器封头型面, 基于封头段所有缠绕纱带总体积保持不变条件, 提出了一种采用三次样条函数来预测复合材料压力容器封头厚度的方法。采用该方法对具有不同几何尺寸、 不同缠绕工艺参数的复合材料压力容器进行了封头厚度预测, 并与传统预测方法及实际厚度测量值作了对比分析。算例结果表明, 该方法能够比传统方法更准确地预测纤维缠绕复合材料压力容器的封头厚度, 从而为有限元建模分析提供精确的厚度参数。Abstract: This research aims to establish a method to predict the dome thickness of composite pressure vessels. According to the dome shape of cured composite pressure vessels, a cubic spline function was presented to predict the dome thickness based on the volume of all fiber tows being constant. Using this method, the dome thickness of an arbitrary composite pressure vessel with different geometrical parameters and process parameters was forecasted. The predictive results were compared with the traditional methods and actual measured thickness. The results show that dome thickness obtained from the cubic spline function could reflect actual measured thickness better than the other methods and it could provide more accurate thickness parameters for the finite element modeling.
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Key words:
- composite pressure vessel /
- filament winding /
- dome thickness /
- prediction method
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