LIU Mengyang,GAO Jingwei,YAN Bo,et al. Optimization design of anti-creep reinforcement structure for solid rocket motor propellant grain[J]. Journal of Mechanical Strength,2025,47(3):121-128.
LIU Mengyang,GAO Jingwei,YAN Bo,et al. Optimization design of anti-creep reinforcement structure for solid rocket motor propellant grain[J]. Journal of Mechanical Strength,2025,47(3):121-128. DOI: 10.16579/j.issn.1001.9669.2025.03.015.
Optimization design of anti-creep reinforcement structure for solid rocket motor propellant grain
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
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
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