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朱擎, 李述涛, 陈叶青, 马上, 魏万里, 张生, 陈嘉琳. 高强钢-钢筋混凝土复合防护结构厚度极限计算方法[J]. 力学学报.
引用本文: 朱擎, 李述涛, 陈叶青, 马上, 魏万里, 张生, 陈嘉琳. 高强钢-钢筋混凝土复合防护结构厚度极限计算方法[J]. 力学学报.
HIGH STRENGTH STEEL - REINFORCED CONCRETE COMPOSITE PROTECTIVE STRUCTURE THICKNESS LIMIT CALCULATION METHOD[J]. Chinese Journal of Theoretical and Applied Mechanics.
Citation: HIGH STRENGTH STEEL - REINFORCED CONCRETE COMPOSITE PROTECTIVE STRUCTURE THICKNESS LIMIT CALCULATION METHOD[J]. Chinese Journal of Theoretical and Applied Mechanics.

高强钢-钢筋混凝土复合防护结构厚度极限计算方法

HIGH STRENGTH STEEL - REINFORCED CONCRETE COMPOSITE PROTECTIVE STRUCTURE THICKNESS LIMIT CALCULATION METHOD

  • 摘要: 为探究弹体高速冲击下,高强钢-钢筋混凝土复合防护结构的穿甲侵彻机理和厚度极限计算方法,为此类复合防护结构设计提供依据和参考,本文对临界贯穿状态时前覆高强钢板与钢筋混凝土背板的穿甲失效模式进行了解耦分析,建立了高强钢-钢筋混凝土复合防护结构临界穿甲理论模型,基于冲击动力学理论,研究给出无背板支撑下高强钢、无限厚背板支撑下高强钢、钢筋混凝土背板共三类厚度极限控制方程,提出复合防护结构整体厚度极限计算方法。结合理论计算和数值模拟研究结果,科学设计验证性试验工况,利用35mm口径滑膛火炮开展弹体侵彻高强钢-C40钢筋混凝土复合靶标模型试验。试验结果成功验证了弹体临界贯穿复合防护结构时靶体厚度极限值,揭示了复合防护结构抗侵彻机理,证明了理论模型假设的合理性和计算方法的可靠性。研究结果表明:理论计算结果总体与数值模拟和试验验证的结果相吻合,由于不考虑弹体质量损失、材料动态应变率效应等因素,理论计算的厚度极限结果较试验验证数据偏高,对于工程防护设计而言偏向安全。

     

    Abstract: In order to explore the armor penetration mechanism and thickness limit calculation method of high-strength steel-reinforced concrete composite protective structure under high-speed impact of projectile body, and to provide basis and reference for the design of such composite protective structure, this paper analyzes the armor penetration failure mode of the front high-strength steel plate and reinforced concrete backplane under critical penetration state. A theoretical model of critical armor penetration of high-strength steel-reinforced concrete composite protective structure is established. Based on the impact dynamics theory, three kinds of thickness limit governing equations of high-strength steel without backplane support, high-strength steel with infinite thickness backplane support and reinforced concrete backplane support are studied, and the calculation method of the overall thickness limit of composite protective structure is proposed. Combined with the results of theoretical calculation and numerical simulation, the verified test condition was scientifically designed, and the model test of projectile penetration of high-strength steel-C40 reinforced concrete composite target was carried out by using 35mm bore gun. The test results successfully verify the limit value of target thickness when the missile body penetrates the composite protective structure critically, reveal the anti-penetration mechanism of the composite protective structure, and prove the rationality of the theoretical model hypothesis and the reliability of the calculation method. The results show that the theoretical calculation results are generally in agreement with the numerical simulation and experimental verification results. The thickness limit results of the theoretical calculation are higher than the experimental verification data because the factors such as the mass loss of the projectile

     

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