【摘要】 为可靠开展气密防护门抗龙卷风设计与评估，利用数值仿真技术研究了某核电厂特种气密防护门在F4级龙卷风飞射物作用下的冲击性能和破坏机制。基于支撑旋转角和防护门破坏模式提出了气密防护门抗龙卷风安全性能和气密性评估标准；考察了气密防护门在三种风致飞射物撞击下的气密性、破坏模式、耗能机制及安全性能。结果表明：气密防护门在F4级龙卷风作用下未能满足使用要求，气密防护门在的F4级龙卷风作用下的破坏模式以侵入和局部变形为主，飞射物的撞击位置对防护门的耗能机制有一定的影响。更多还原

【Abstract】 In order to reliably carry out the tornado-resistant design and evaluation of airtight protective door, the numerical simulation technology was used to study the impact performance and failure mechanism of the special airtight protective door of a nuclear power plant under F4 tornado load. Based on the support rotation angle and the protection door failure mode, the safety performance and air tightness evaluation criteria of the airtight protection door against tornado were proposed. The airtightness, failure mode, energy dissipation mechanism and safety performance of the airtight protection door under three wind-induced missiles impact were investigated. The results show that the airtight protective door fails to meet the requirements under F4 tornado load. The failure mode of the airtight protective door under F4 tornado load is mainly intrusion and local deformation. The impact position has a certain influence on the energy dissipation mechanism of protective door.更多还原