【作者】 刘晓睿； 薛素铎； 王玮； 赵润生； 李雄彦；

【Author】 LIU Xiaorui;XUE Suduo;WANG Wei;ZHAO Runsheng;LI Xiongyan;Faculty of Architecture, Civil and Transportation Engineering, Beijing University of Technology;

【机构】 北京工业大学城市建设学部；

【摘要】 气肋式膜结构是一种以气肋为支撑构件的空间结构,二十世纪六十年代以来,气肋式膜结构因具有经济性、便携性以及敏捷部署性等优点而被广泛应用于军事领域及航天领域。以浅埋地下工程中采用的"模块化"高压气肋式膜结构为对象,研究爆炸荷载作用下结构的动力响应特征。采用非线性有限元法,模拟了高压气肋结构在不同高度及不同装药量的空中爆炸作用下的动力响应及破坏模式,并进一步采用参数分析方法探讨了气肋内压对结构动力响应特征的影响。结果表明,降低爆炸高度和增加装药量均会显著增大结构的动力响应,并且随着装药量的增加,结构响应模式从轻微振动逐渐演化为大变形振动并导致屈曲,而内压的提升可显著增强结构抵抗爆炸冲击的能力。更多还原

【Abstract】 Air-inflated arch structure is a space structure with air ribs as support components. Since the 1960s, the air-inflatedarch structure has been widely used in the military field because of its advantages of economy, portability and agile deployment. In this paper, the "modular" high-pressure air-ribbed membrane structure used in shallow underground engineering is taken as the object to study the dynamic response of the structure under explosive load. By using nonlinear finite element method, the dynamic response and destruction mode of high-pressure air-inflated arch structure under air explosion with different heights and different amount of dynamite were simulated. Furthermore, the influence of the internal pressure of air-rib on the dynamic response characteristics of the structure was discussed by parameter analysis.The results show that the dynamic response of the structure is significantly increased by decreasing the explosion height and increasing the loading amount. With the increase of the loading amount, the response mode of the structure gradually evolves from slight vibration to large deformation vibration and leads to buckling, and the increase of the internal pressure can significantly enhance the ability of the structure to resist the explosion impact.更多还原