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基于任意拉格朗日-欧拉(ALE)方法求解了流体-结构耦合问题,其中囊体部分采用拉格朗日方法进行描述,流体区域采用ALE方法进行描述,并通过罚函数方法实现了两者间的耦合.首先采用该方法模拟了囊体的充气过程,研究了不同充气状态对囊体初始应力的影响;然后建立了囊式浮桥的整体有限元模型,充分考虑了囊体内外部流体的影响,计算了不同内压下的囊式浮桥动力响应问题.研究结果表明,不同的充气压力不仅会在充气阶段对囊体产生影响,而且会在载荷通过时对囊体压缩变形、应力分布及垂向位移等方面产生较为明显的影响.该研究结果可为囊式浮桥囊体设计及整体设计提供参考.
The fluid-structure coupling problem was solved based on an arbitrary Lagrange-Euler (ALE) method. The capsule was described by the Lagrange method, the fluid region was described by the ALE method, and the penalty function method was used to realize the two- Firstly, this method is used to simulate the inflation process of the balloon, and the influence of different inflation states on the initial stress of the balloon is studied. Then, the overall finite element model of the balloon-type pontoon is established, taking fully into account the internal and external fluid , The dynamic response of the capsule pontoon under different internal pressures is calculated.The results show that different inflation pressures not only affect the capsule during the inflation stage but also affect the capsule deformation, stress distribution, Vertical displacement and other aspects have a more significant impact on the results of this study can be cystic pontoon balloon design and the overall design to provide a reference.