机身壁板结构入水冲击的ALE-FEM耦合数值模拟和试验验证

孙李刚; 吕锦锋; 梁元

doi:10.7643/issn.1672-9242.2026.09.005

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装备环境工程 ›› 2026, Vol. 23 ›› Issue (9) : 50-59. DOI: 10.7643/issn.1672-9242.2026.09.005

专刊——航空装备结构动力学

机身壁板结构入水冲击的ALE-FEM耦合数值模拟和试验验证

孙李刚, 吕锦锋, 梁元

作者信息 +

ALE-FEM Coupling Numerical Simulation and Experimental Verification for Water-entry Impact of the Stiffened Panel

SUN Ligang, LYU Jinfeng, LIANG Yuan

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文章历史 +

摘要

目的开展机身壁板结构入水冲击的ALE-FEM耦合数值模拟,并进行壁板结构入水冲击试验验证该方法的准确性。方法基于LS-DYNA软件,采用任意拉格朗日-欧拉法（ALE）和有限元法（FEM）耦合方法,建立铝合金加筋壁板垂直入水冲击的流固耦合模型,对加筋壁板在垂直入水过程中的动力响应进行数值模拟,并进行壁板垂直入水冲击试验。结果加速度测点和压力测点的仿真值与试验值误差在10%以内,验证了数值模拟的准确性。壁板结构入水冲击过程中,砰击力迅速增大,达到峰值后降低。由于结构变形和流固耦合引起的壁板振动使砰击力存在第二峰值,入水方向上的加速度迅速增大,达到峰值后降低,而后不断振荡。壁板应力较大的位置主要分布在桁条、隔框以及与桁条、隔框相连接的蒙皮附近。结论 ALE-FEM方法能有效地模拟流体-结构相互作用,为飞机水上迫降安全设计提供了重要的理论支持。

Abstract

The work aims to carry out ALE-FEM coupling numerical simulation of the water-entry impact of stiffened panel structures, and conduct water-entry impact experiments on the panel structures to verify the accuracy of the method. Based on LS-DYNA software, the fluid-solid coupling model for vertical water-entry impact of the aluminum alloy stiffened panel was established with the coupling arbitrary Lagrangian-Euler method (ALE) and finite element method (FEM) to carry out numerical simulation and experimental verification on the water-entry impact of the stiffened panel. The error between simulation value and test value of acceleration measuring point and pressure measuring point was within 10%, verifying the accuracy of numerical simulation. During the water-entry process, the slamming force rapidly increased to the peak, and decreased after that. The panel vibration was caused by structural deformation and fluid-solid coupling, further triggering the second peak of slamming force. The vertical acceleration also rapidly increased to the peak and then decreased and continuously oscillated. The locations with high stress of the panel were mainly distributed on the longitudinal stringers, partition frame and the skin connected with them. The ALE-FEM method can effectively simulate fluid-structure interaction, which provides important theoretical support for the safety design of aircraft ditching.

导出引用

孙李刚, 吕锦锋, 梁元. 机身壁板结构入水冲击的ALE-FEM耦合数值模拟和试验验证[J]. 装备环境工程. 2026, 23(9): 50-59 https://doi.org/10.7643/issn.1672-9242.2026.09.005

SUN Ligang, LYU Jinfeng, LIANG Yuan. ALE-FEM Coupling Numerical Simulation and Experimental Verification for Water-entry Impact of the Stiffened Panel[J]. Equipment Environmental Engineering. 2026, 23(9): 50-59 https://doi.org/10.7643/issn.1672-9242.2026.09.005

中图分类号： V215

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