为考虑初始椭圆度对螺旋缠绕结构拉伸刚度的影响，建立了一种新的基于椭圆柱面和螺旋带的分析模型，该模型在两者之间建立了一个新的几何关系，并考虑了在椭圆柱面上螺旋带的轴向应变和曲率变化以及柱面和螺旋层之间的接触压力。通过 ABAQUS建立一个3D有限元模型验证了理论模型的合理性。在理论模型中，对初始椭圆度进行参数分析得到不同初始椭圆度对椭圆层拉伸刚度的影响，随着管道初始椭圆度的增加，螺旋层拉伸刚度有下降的趋势，但降幅很小。
To consider the influence of initial ovality on the tension stiffness of helical wound structure,a analytical model was presented based on the elliptical cylinder and helix.A new geometrical relationship was established be-tween them.The axial strain,curvature variation of helix on elliptical cylinder and contact pressure between cylinder and helical layer were considered in the model.A 3D finite element model using ABAQUS was developed to validate the reasonability of the theoretical model.In the theoretical model,initial ovality was parametric analyzed to obtain the effect of initial ovality on the tension stiffness in helical layer.With the increase of initial ovality of pipe,the ten-sion stiffness of helical layer decreases,but the decline is small.
参考文献
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