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condition on the railway tunnel bed was analyzed by using the elastic bearing method. In calculation the load on tunnel bed is considered as two situations, that is, uniform and the real testing condition... bed; elastic bearing method
such as shell-beam-bar, superposition plates, beam axis-spring, shell-spring, shell-solid connections in high speed railway’s slab track, Timoshenko-type shell theory and direct introduction method were... by which the dynamic FEM model of the high speed railway’s slab track was thereby established. The reliability of the FEM model based on Timoshenko-type shell theory and direct introduction method......高速铁路双块式无砟轨道计算模型约束方程的建立
来源: 《中南大学学报(自然科学版)2010年第4期》——卿启湘 胡萍 王永和 尹汉锋 张春顺
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; nonlinear finite element method 无砟轨道技术是一项现代化铁路技术,具有良好的运营功能并可取得明显的经济效益.高速铁路采用无砟轨道后,轨道稳定性相应增强,列车运行的平稳性和安全性大大提高.由于取消了易产生残余变形的道砟,大大降低了轨道几何状态变化的速率, 维修工作量大大减少,有利于列车高密度运行.随着无砟轨道技术的发展,无砟轨道已在国外高速铁路上得到广泛采用,我国新建高速客运专线也..., ZENG Qing-yuan. A new method for dynamics modeling of ballastless track[J]. Journal of Central South University: Science and Technology, 2007, 38(6): 1206-1211. [5] 向 俊, 曹 晔, 刘保钢, 等. 客运专线板式无砟轨道动力设计参数[J......
model of double T beam solar radiation temperature field was established by using the finite element method. The beam section temperature distribution of the corresponding testing moment was analyzed... railway. Key words: Qinghai-Tibet railway; double T beam; daily temperature difference; finite element method 青藏铁路格拉段是纵贯我国西部青海省,西藏自治区,跨越青藏高原,全长1 142 km,平均海拔高度4 500 m以上,其中海拔4 000 m以上的路段960 km,翻越唐古拉山的铁路最高点海......
and Mo ore; multi-metal ore dressing wastewater; coagulation-sedimentation method; field test...0.5 mg/L 和80 μg/L 以下,未检出Be 和Cd,出水水质满足<污水综合排放标准>(GB 8978-1996)一级标准.关键词:钨铋钼矿;多金属矿选矿废水;混凝沉淀法;现场试验Coagulation and sedimentation treating wastewater from W containing multi-metal ore dressing processGUO Zhao......
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nanoparticles; flow-levitation method......
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