激波作用下含缺陷固体火箭装药的流固耦合数值模拟

郭攀; 武文华; 刘君; 吴志刚

激波作用下含缺陷固体火箭装药的流固耦合数值模拟

郭攀¹,
武文华^1, ,,
刘君²,
吴志刚²

1.
大连理工大学运载工程与力学学部工业装备结构分析国家重点实验室，辽宁大连 116024
2.
大连理工大学运载工程与力学学部航空航天学院，辽宁大连 116024

基金项目: 国家自然科学基金创新研究群体项目（50921001）；国家重点基础研究计划（973计划）项目（2011CB013705）；国家科技重大专项（2011ZX05026-002-02）

详细信息

作者简介:
郭攀(1982—), 男, 博士研究生

通讯作者:
Wu Wen-hua, xlyuhua@dlut.edu.cn

中图分类号: O354.5
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- 被引次数: 0
出版历程
- 收稿日期: 2012-05-14
- 修回日期: 2012-10-10
- 刊出日期: 2014-01-25

Numerical simulation of fluid-structure interaction in defect-contained charge of solid rocket motor subjected to shock waves

1.
State Key Laboratory of Structural Analysis for Industrial Equipment, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116024, Liaoning, China
2.
School of Aeronautics and Astronautics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116024, Liaoning, China

Funds: Supported by the National Natural Sience Foundation of China (50921001); the National Basic Program of China (973 Program)(2011CB013705); the National S & T Major Projct (2011ZX05026-002-02)

摘要

摘要: 采用弱耦合方法对激波作用下固体火箭发动机含缺陷药柱的流固耦合相互作用进行数值模拟。其中非定常流场采用基于任意拉格朗日-欧拉坐标系下的二维可压缩Euler方程进行描述，并采用格心格式的有限体积方法对方程进行离散求解；对激波冲击作用下含装药裂纹的固体位移场采用时域间断Galerkin扩展有限元法进行数值模拟，并对裂纹尖端动态应力强度因子进行计算。结果表明：激波在固体火箭发动机内装药裂缝传播过程中具有反射、绕射等现象，表现出高度非定常非线性的特点；同时流固耦合相互作用使得裂纹尖端位移场以及应力强度因子表现出振荡效应。
- 流体力学 /
- 流固耦合 /
- 时域间断Galekin扩展有限元方法 /
- 固体火箭装药 /
- 激波 /
- 裂缝
Abstract: A loosing coupling strategy was adopted to simulate the propellant of the solid rocket motor.Pressure field was computed by solving the 2-D time-dependent Euler equations within an arbitrary Lagrangian-Eulerian(ALE)framework and the cell-centered finite volume scheme.The time discontinuous Galerkin extended finite element method is implemented to simulate the dynamic response in solid phase under the shock waves.The stress intensity factor was also calculated in the solid field subjected to the impulse loading.The results show that the propagation process of the shock wave in the crack displays highly nonlinear characteristics of reflection and diffraction.Both the displacement field and the stress intensity factor show oscillation effects under the coupled fluid-structure interaction.
- fluid mechanics /
- fluid-structure interaction /
- time discontinuous Galerkin extended finite element method /
- charge of solid rocket /
- shock wave /
- crack

HTML全文

图 1 网络模型划分

Figure 1. Model and mesh

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图 2 初始时刻激波流线

Figure 2. Shock wave at initial time

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图 3 含裂纹的固体模型及网格划分

Figure 3. Mesh of solid with crack

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图 4 监控点压力曲线

Figure 4. Pressure of monitoring points

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图 5 激波扫裂纹的密度等位线

Figure 5. Density contour of shock wave

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图 6 P₁处y方向位移曲线

Figure 6. Displacement curve along y axis at P₁

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图 7 应力强度因子计算比较

Figure 7. Contrast of the stress intensity factors

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