发射筒易碎前盖开盖过程的流体与固体耦合仿真方法

doi:10.3969/j.issn.1000-1093.2021.08.010

摘要/Abstract

摘要： 发射筒易碎前盖的压力波开盖过程是一个典型的流体与固体耦合问题。为研究易碎前盖的开启仿真过程，对易碎盖聚氨酯复合材料分别做了静态拉压实验、动态拉压实验，并利用用户子程序VUSDFLD对混凝土塑性损伤（CDP）本构模型进行扩展开发，用以描述易碎盖材料的承载和破裂状况；基于计算流体力学（CFD）的发射筒内流场仿真，对欧拉方法的同工况模型进行仿真校验，并借助耦合的欧拉-拉格朗日（CEL）算法对易碎前盖的开启过程进行仿真。结果表明：所开发的含单元失效的CDP本构模型能较好地吻合材料实验和产品实验情况；CFD与CEL算法相结合的仿真方法能有效解决压力波开盖这类流体与固体耦合问题，且具有较高精度。

关键词: 发射筒, 易碎盖, 聚氨酯, 混凝土塑性损伤本构, 耦合的欧拉-拉格朗日算法, 流体与固体耦合

Abstract: The opening process of fragile front cover of canister launcher in the pressure wave is a typical fluid-structure interaction problem. In order to study this opening process, the static tensile and compression test，and the dynamic tensile and compression test are carried out on the polyurethane composite material of fragile front cover，respectively. The subroutine VUSDFLD is used to expand the concrete damage plasticity (CDP) constitutive model to describe the loading and cracking conditions of the fragile front cover. Based on the computational fluid dynamics (CFD) simulation results of the flow field in the canister launcher, an Euler’s method-based model of the same case is built and verified, and the opening process of the fragile front cover is simulated by the coupled Eulerian-Lagrangian (CEL) algorithm. It shows that the simulated results based on the developed CDP model are in good agreement with the experimental data; and the simulation method combining CFD and CEL algorithms can effectively solve the fluid-structure interaction problem of opening process of fragile front cover and has higher accuracy.

Key words: canisterlauncherfragilecover, polyurethane, concretedamageplasticity, coupledEulerian-Lagrangianalgorithm, fluid-structureinteraction

中图分类号:

TJ768.2⁺1

张宝振，王汉平，窦建中，程梦文. 发射筒易碎前盖开盖过程的流体与固体耦合仿真方法[J]. 兵工学报, 2021, 42(8): 1660-1669.

ZHANG Baozhen, WANG Hanping, DOU Jianzhong, CHENG Mengwen. Fluid-structure Coupling Simulation Method for the Opening Process of Fragile Front Cover of Canister Launcher[J]. Acta Armamentarii, 2021, 42(8): 1660-1669.

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