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基于复合材料的性能预测,对空投柔性储液容器的抗冲击性和动态响应进行了研究。针对该类材料结构具有周期性的特点,在单胞有限元模型基础上,应用周期性边界条件加载方法,通过数值模拟预测了复合材料的宏观性能和力学参数。以此为基础,采用基于任意拉格朗日欧拉(ALE)描述的流固耦合方法,通过数值仿真研究了装水量80%(体积分数)的柔性容器空投冲击的动态响应,并将获得的结果与物理实验进行了对比,证明了本文中采用的性能预测方法、有限元模型和流固耦合技术的合理性和有效性。
Based on the performance prediction of composite materials, the impact resistance and dynamic response of airdrop flexible storage containers were studied. Aiming at the periodicity of this kind of material structure, on the basis of the unit cell finite element model, the periodic boundary condition loading method is applied to predict the macroscopic properties and mechanical parameters of the composites by numerical simulation. Based on this, the fluid-structure interaction method based on arbitrary Lagrange Eulerian (ALE) method was used to study the dynamic response of the flexible container with the water content of 80% (volume fraction) by the numerical simulation. The dynamic response of the obtained The result is compared with the physical experiment, which proves the rationality and effectiveness of the performance prediction method, the finite element model and the fluid-solid coupling technology adopted in this paper.