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To address the creep issue that arises during the long-term vertical storage of solid rocket motor (SRM), a method was proposed that involved embedding a specially shaped functional combustible core model (reinforcement structure) into the propellant grain matrix without altering the basic structure of the grain. Initially, the distribution patterns of creep in the propellant grain under the coupled effect of solidification cooling and vertical self-weight were analyzed by using three-dimensional numerical simulation methods. Subsequently, the reinforcement structure was designed by using the solid isotropic material with penalization (SIMP) method for topology optimization, determining the geometric configuration of the embedded reinforcement structure. Finally, the final optimized design results were determined through comparative analysis of the anti-creep effect of the topology-optimized reinforcement structure. The research results demonstrate that the deformation stress and strain of the solid rocket motor propellant grain with the reinforcement structure are significantly reduced compared to those without the reinforcement structure, effectively suppressing the creep of the grain.
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针对长期立贮固体火箭发动机(Solid Rocket Motor, SRM)产生的蠕变问题,提出一种在不改变药柱基本结构的前提下,通过在药柱基质中植入特定形状的功能性可燃芯模(即“增强结构”)抑制药柱蠕变。首先,通过三维数值模拟方法分析固化降温和立式自重耦合作用下药柱蠕变分布规律。随后,采用变密度法中的固体各向同性材料惩罚模型(Solid Isotropic Material with Penalization, SIMP)对增强结构进行拓扑优化设计,确定植入增强结构的基本几何构型。最后,对比分析拓扑优化后增强结构的抗蠕变作用,得到最终优化设计结果。结果表明,在特定工况下,与无增强结构相比,含增强结构的固体火箭发动机药柱总变形、应力、应变下降明显,能有效抑制药柱蠕变。
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刘孟洋,女,2000年生,山东青岛人,在读硕士研究生;主要研究方向为结构优化设计;E-mail:1519370554@qq.com。
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Calculation results of propellant grain under the coupled effect of solidification cooling and vertical self-weight loading, figureFileSmall=Kt7jccLI8S6TQelJYKbYiw==, figureFileBig=EJK/fmiYsnxHHeM3TtbE/w==, tableContent=null), ArticleFig(id=1240594171355001069, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=图2, caption=
固化降温和立式自重载荷耦合作用下的药柱计算结果, figureFileSmall=Kt7jccLI8S6TQelJYKbYiw==, figureFileBig=EJK/fmiYsnxHHeM3TtbE/w==, tableContent=null), ArticleFig(id=1240594172906893560, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Fig. 3, caption=
Design region of the reinforcement structure, figureFileSmall=/x/638xZ5BAU9DL/WeCAmw==, figureFileBig=REJmYwiBxrypUomJQ8LGxg==, tableContent=null), ArticleFig(id=1240594173062082811, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=图3, caption=
增强结构设计区域, figureFileSmall=/x/638xZ5BAU9DL/WeCAmw==, figureFileBig=REJmYwiBxrypUomJQ8LGxg==, tableContent=null), ArticleFig(id=1240594173242437885, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Fig. 4, caption=
Static hydrostatic pressure under propellant grain casting condition, figureFileSmall=f6RPyJb9tCRDAuliRSNHPQ==, figureFileBig=gj4rD2+999zgcfLGGvTOQQ==, tableContent=null), ArticleFig(id=1240594173343101188, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=图4, caption=
药柱浇注工况的静水压力, figureFileSmall=f6RPyJb9tCRDAuliRSNHPQ==, figureFileBig=gj4rD2+999zgcfLGGvTOQQ==, tableContent=null), ArticleFig(id=1240594173473124617, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Fig. 5, caption=
Topology optimization results under propellant grain casting design condition, figureFileSmall=41SWlSpRkycWqe8sFFE6hw==, figureFileBig=GzwyGKTW319WPcdilQMeQQ==, tableContent=null), ArticleFig(id=1240594173590565136, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=图5, caption=
药柱浇注设计工况的拓扑优化结果, figureFileSmall=41SWlSpRkycWqe8sFFE6hw==, figureFileBig=GzwyGKTW319WPcdilQMeQQ==, tableContent=null), ArticleFig(id=1240594173691228434, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Fig. 6, caption=
Sub-model boundary constraints under solidification cooling design condition, figureFileSmall=doGkITPFXiaIs2ApWnpzPg==, figureFileBig=U5+A+2gt48ZvBSUIbE9/wQ==, tableContent=null), ArticleFig(id=1240594173808668952, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=图6, caption=
固化降温设计工况的子模型边界约束, figureFileSmall=doGkITPFXiaIs2ApWnpzPg==, figureFileBig=U5+A+2gt48ZvBSUIbE9/wQ==, tableContent=null), ArticleFig(id=1240594173938692384, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Fig. 7, caption=
Topology optimization results under solidification cooling design condition, figureFileSmall=D9c/b29uwXswu/WmNBBC+w==, figureFileBig=U4b69kO+LNVe2E6OngfQ6A==, tableContent=null), ArticleFig(id=1240594174009995556, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=图7, caption=
固化降温设计工况的拓扑优化结果, figureFileSmall=D9c/b29uwXswu/WmNBBC+w==, figureFileBig=U4b69kO+LNVe2E6OngfQ6A==, tableContent=null), ArticleFig(id=1240594174106464553, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Fig. 8, caption=
Sub-model boundary constraints under creep development design condition, figureFileSmall=qhFiwhdJF4+cMoiyx2O/aw==, figureFileBig=yrYz6dUssR+3YyqGklNn5Q==, tableContent=null), ArticleFig(id=1240594174198739247, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=图8, caption=
蠕变发展设计工况的子模型边界约束, figureFileSmall=qhFiwhdJF4+cMoiyx2O/aw==, figureFileBig=yrYz6dUssR+3YyqGklNn5Q==, tableContent=null), ArticleFig(id=1240594174307791156, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Fig. 9, caption=
Topology optimization results under creep development design condition, figureFileSmall=DmyYLLJXkRXWYReic9d1kg==, figureFileBig=syKYpauwCe555pyCf0w7Dg==, tableContent=null), ArticleFig(id=1240594174404260152, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=图9, caption=
蠕变发展设计工况的拓扑优化结果, figureFileSmall=DmyYLLJXkRXWYReic9d1kg==, figureFileBig=syKYpauwCe555pyCf0w7Dg==, tableContent=null), ArticleFig(id=1240594174542672193, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Fig. 10, caption=
3D models of the reinforcement structure after optimization, figureFileSmall=m3g2vUOoGdt3o3KYoa+qig==, figureFileBig=RpYBqF7fVkrkxLaj/Z+MRg==, tableContent=null), ArticleFig(id=1240594174672695620, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=图10, caption=
优化后的增强结构三维模型, figureFileSmall=m3g2vUOoGdt3o3KYoa+qig==, figureFileBig=RpYBqF7fVkrkxLaj/Z+MRg==, tableContent=null), ArticleFig(id=1240594174794330442, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Fig. 11, caption=
Total deformation nephogram, figureFileSmall=DcF7SPM2aKPdTCAdIfEXUw==, figureFileBig=Yl/P1uPTJZCTjGKp3YBTNQ==, tableContent=null), ArticleFig(id=1240594174924353869, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=图11, caption=
总变形云图, figureFileSmall=DcF7SPM2aKPdTCAdIfEXUw==, figureFileBig=Yl/P1uPTJZCTjGKp3YBTNQ==, tableContent=null), ArticleFig(id=1240594175050182997, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Fig. 12, caption=
Equivalent stress nephogram, figureFileSmall=pjD4lLQWR0P2W0JsQ41FWg==, figureFileBig=IZCwSqjb+YAFleSZMJyLRA==, tableContent=null), ArticleFig(id=1240594175159234904, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=图12, caption=
等效应力云图, figureFileSmall=pjD4lLQWR0P2W0JsQ41FWg==, figureFileBig=IZCwSqjb+YAFleSZMJyLRA==, tableContent=null), ArticleFig(id=1240594175264092509, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Fig. 13, caption=
Equivalent elastic strain nephogram, figureFileSmall=xhXnTwwqwIQrvIutEv7vzQ==, figureFileBig=P28gh8JXPkc7ZAcmgVlpEA==, tableContent=null), ArticleFig(id=1240594175343784288, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=图13, caption=
等效弹性应变云图, figureFileSmall=xhXnTwwqwIQrvIutEv7vzQ==, figureFileBig=P28gh8JXPkc7ZAcmgVlpEA==, tableContent=null), ArticleFig(id=1240594175448641893, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Fig. 14, caption=
Solid rocket motor model with the reinforcement structure, figureFileSmall=U7IZzIj1MCKVIKso50otag==, figureFileBig=mqJoBFfy15W+IABPoN96iA==, tableContent=null), ArticleFig(id=1240594175545110891, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=图14, caption=
含增强结构的固体火箭发动机模型, figureFileSmall=U7IZzIj1MCKVIKso50otag==, figureFileBig=mqJoBFfy15W+IABPoN96iA==, tableContent=null), ArticleFig(id=1240594175645774189, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Tab.1, caption=
Material parameters of solid rocket motor
, figureFileSmall=null, figureFileBig=null, tableContent=
材料参数 Material parameter | 壳体 Case | 绝热层 Insulation | 药柱 Propellant grain |
|---|
| 弹性模量Elastic modulus/MPa | 2.1×105 | 3.5 | 3.6 |
| 泊松比Poisson ratio | 0.3 | 0.499 5 | 0.496 |
热膨胀系数 Expansion coefficient/℃-1 | 1.2×10-5 | 1.3×10-5 | 1×10-5 |
| 密度Density/(kg/cm3) | 7 800 | 1 260 | 1 800 |
), ArticleFig(id=1240594175733854578, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=表1, caption=
固体火箭发动机材料参数
, figureFileSmall=null, figureFileBig=null, tableContent=
材料参数 Material parameter | 壳体 Case | 绝热层 Insulation | 药柱 Propellant grain |
|---|
| 弹性模量Elastic modulus/MPa | 2.1×105 | 3.5 | 3.6 |
| 泊松比Poisson ratio | 0.3 | 0.499 5 | 0.496 |
热膨胀系数 Expansion coefficient/℃-1 | 1.2×10-5 | 1.3×10-5 | 1×10-5 |
| 密度Density/(kg/cm3) | 7 800 | 1 260 | 1 800 |
), ArticleFig(id=1240594177243804024, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Tab. 2, caption=
Prony series
, figureFileSmall=null, figureFileBig=null, tableContent=
| i | 1 | 2 | 3 | 4 | 5 |
|---|
| Ei/MPa | 2.90 | 2.39 | 1.14 | 0.66 | 0.36 |
| τi /s | 0.01 | 0.04 | 1.19 | 19.51 | 1 010.67 |
), ArticleFig(id=1240594177411576187, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=表2, caption=
Prony级数
, figureFileSmall=null, figureFileBig=null, tableContent=
| i | 1 | 2 | 3 | 4 | 5 |
|---|
| Ei/MPa | 2.90 | 2.39 | 1.14 | 0.66 | 0.36 |
| τi /s | 0.01 | 0.04 | 1.19 | 19.51 | 1 010.67 |
), ArticleFig(id=1240594177545793920, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Tab. 3, caption=
Material parameters of the reinforcement structure
, figureFileSmall=null, figureFileBig=null, tableContent=
材料参数 Material parameter | 增强结构 Reinforcement structure |
|---|
| 弹性模量Elastic modulus/MPa | 40 |
| 泊松比Poisson ratio | 0.4 |
| 热膨胀系数Expansion coefficient/℃-1 | 4×10-6 |
| 密度Density/(kg/cm3) | 2 100 |
), ArticleFig(id=1240594177717760388, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=表3, caption=
增强结构材料参数
, figureFileSmall=null, figureFileBig=null, tableContent=
材料参数 Material parameter | 增强结构 Reinforcement structure |
|---|
| 弹性模量Elastic modulus/MPa | 40 |
| 泊松比Poisson ratio | 0.4 |
| 热膨胀系数Expansion coefficient/℃-1 | 4×10-6 |
| 密度Density/(kg/cm3) | 2 100 |
), ArticleFig(id=1240594177793257866, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=EN, label=Tab.4, caption=
Comparison of static analysis results
, figureFileSmall=null, figureFileBig=null, tableContent=
结果对比 Comparison of results | 无增强结构 Structure without reinforcement | 有增强结构 Structure with reinforcement | 优化百分比 Optimized percentage/% |
|---|
总变形 Total deformation/mm | 23.299 | 13.651 | 41.41 |
等效应力 Equivalent stress/MPA | 0.132 41 | 0.094 32 | 28.77 |
等效弹性应变 Equivalent elastic strain | 0.299 52 | 0.214 31 | 28.45 |
), ArticleFig(id=1240594177914892689, tenantId=1146029695717560320, journalId=1227999626482147330, articleId=1240594160248484619, language=CN, label=表4, caption=
静力学分析结果对比
, figureFileSmall=null, figureFileBig=null, tableContent=
结果对比 Comparison of results | 无增强结构 Structure without reinforcement | 有增强结构 Structure with reinforcement | 优化百分比 Optimized percentage/% |
|---|
总变形 Total deformation/mm | 23.299 | 13.651 | 41.41 |
等效应力 Equivalent stress/MPA | 0.132 41 | 0.094 32 | 28.77 |
等效弹性应变 Equivalent elastic strain | 0.299 52 | 0.214 31 | 28.45 |
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