| 陈炎,金伟,王用岩,黄虎.爆炸螺栓分离对热防护系统冲击响应分析[J].装备环境工程,2018,15(9):21-25. CHEN Yan,JIN Wei,WANG Yong-yan,HUANG Hu.Impact Response of Thermal Protection System under Explosive Bolt Separation Procedure[J].Equipment Environmental Engineering,2018,15(9):21-25. |
| 爆炸螺栓分离对热防护系统冲击响应分析 |
| Impact Response of Thermal Protection System under Explosive Bolt Separation Procedure |
| 投稿时间：2018-06-25 修订日期：2018-09-25 |
| DOI：10.7643/ issn.1672-9242.2018.09.005 |
| 中文关键词: 爆炸螺栓 流固耦合 冲击响应 |
| 英文关键词:explosive bolt fluid-structure interaction impact response |
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| 中文摘要: |
| 目的 考察在爆炸螺栓分离过程中，作用在TPS（热防护系统）上的冲击响应是否会导致其破坏，从而影响航天器飞行安全，对过程进行数值仿真分析。方法 提出四阶段仿真方案，基于MSC. Dytran软件，采用流固耦合方法对爆炸螺栓分离过程进行动力学仿真；根据单个爆炸螺栓地面分离试验的结构进行建模和分析，获取结构响应曲线；再根据实测的冲击响应数据，对爆炸过程中炸药及JWL方程的参数等设置进行调整，获取准确爆炸螺栓的分析模型；最后应用于对真实结构中TPS（热防护系统）在分离过程里受爆炸螺栓冲击响应的动力学分析与评估。结果 通过参数调整，获得的仿真模型与爆炸螺栓地面分离试验实测结果一致，证明了仿真模型的有效性和四阶段仿真方案的可行性。结论 提取的真实结构爆炸螺栓分离过程中作用在TPS（热防护结构）上的最大加速度响应曲线，可用于指导TPS（热防护系统）的设计。 |
| 英文摘要: |
| Objective To obtain the impact response of TPS (Thermal Protection System) during the separation process of explosive bolt, to evaluate whether it may suffer from damage and sequentially affect flight safety, and to have numerical analysis on the process. Methods A four step numerical analysis program was held out. First, based on the MSC. Dytran software and fluid-structure interaction method, the process of explosive bolt separation was simulated. Afterwards, FEM and analysis according to the ground test of separation process was held out and the response curve of the structure was extracted. Then, parameters on explosive and JWL equation were adjusted according to the ground test, so a proper model of explosive bolt was obtained. Finally, this model was applied to analyze and assess the dynamics of impact response of explosive bolts in the separation process in real structure and TPS (Thermal Protection System). Results By means of parameter adjustment, the response result from the simulation model had great agreements with the test result, which certified the validity of the model and the feasibility of the four step program. Conclusion The maximum impact acceleration response obtained from the true structure during explosive bolt’s separation process could offer important reference for the design of TPS (Thermal Protection System). |
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