Dynamic Analysis of Underground Composite Structures Under Explosion Loading
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摘要: 在地下抗爆结构的合理选型中,为了改善结构截面的受力状态,使截面各部位的材料强度得到充分的发挥,提出了复合结构的研究方法;采用微段隔离体分析的方法,给出了复合结构的平衡方程、约束方程和变形协调方程,利用广义功的概念直接引入物理意义明确的Lagrange乘子,应用变分方法证明了所构造的广义泛函的正确性.通过算例提出了复合结构截面合理的刚度匹配关系.Abstract: In selecting rational types of underground structures resisting explosion, in order to improve stress states of the structural section and make full use of material strength of each part of the section, the research method of composite structures is presented. Adopting the analysis method of micro-section free body, equilibrium equations, constraint equations and deformation coordination equations are given. Making use of the concept of generalized work and directly introducing Lagrange multiplier specific in physical meaning, the validity of the constructed generalized functional is proved by using variation method. The rational rigidity matching relationship of composite structure section is presented through example calculations.
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[1] 吴祥云,赵玉祥.提高岩体中地下工程承受动载能力的技术途径[J].岩石力学与工程学报,2003,22(2):263. [2] 赵晓兵,方秦.在爆炸荷载作用下地下平面曲杆结构震动分析[J].防护工程,1999,(3):20—25. [3] 赵玉祥,宋熙太,钱尔旋.地下抗爆结构动力分析的基本方法[J].应力数学和力学,1993,14(5):389—396. [4] 钱伟长.变分法及有限元[M].北京:科学出版社,1980. [5] 薛大为.大变形非线性弹性力学的广义变分原理[J].应用数学和力学,1991,12(3):209—215. [6] 赵玉祥.考虑荷载结构和介质相互作用时地下圆形结构的动力分析[J].地下工程,1978,(6):22—25.
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