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平流层浮空器囊体材料具有非线性、黏弹性、各向异性和不能抗压等特点,起皱现象是在升空膨胀过程中必然会出现的形变状态,褶皱的扩展会影响整个囊体结构的受力状态,改变囊体变形和应力分布.同时,褶皱的存在还会影响囊体结构的动力学行为和空间环境下的热力学分布.通过主应力-主应变相结合准则对褶皱区域进行判别,采用修正褶皱单元的本构矩阵方程的方法对褶皱区域进行处理,地面充氦气试验证明了新方法的模拟结果更加接近测试值.从而为平流层浮空器设计提供了一种有效的分析方法.
Stratospheric aerostat material has the characteristics of non-linear, viscoelasticity, anisotropy and compressive strength. The wrinkling phenomenon is the inevitable deformation state in the course of rising and falling. The expansion of the folds will affect the whole capsule The deformation of the capsule and the stress distribution are changed, and the existence of the folds also affects the dynamic behavior of the capsule structure and the thermodynamic distribution in the space environment. The folding region is carried out by the combination of principal stress and principal strain The method of modifying the constitutive matrix equation of the corrugated element is used to deal with the wrinkle area, and the helium filling test on the ground proves that the simulation result of the new method is closer to the test value, thus providing an effective method for designing the stratospheric aerostat Analytical method.