东宝河新安大桥总体设计

该文介绍了东宝河新安大桥新建工程的总体设计。该桥连接深圳市沙井镇新和大道与东莞市长安镇建安大道,为跨市界的城市跨河桥梁,路线全长约1.45 km,其中桥梁(主桥通航主跨156 m)总长约1.08 km,约占路线总长的74.5%。大桥建成后,东宝河两岸的路网将更加完善。     

Warning standards study of real-time monitoring for anti-collapse in large cross-sefction tunnel of soft and weak surrounding rockEI北大核心

Research purposes: The statistics for tunnel disasters showed that the quantities and casualties of tunnel collapse are much higher than other tunnel disasters. Achieved warning before collapse in tunnel construction, can greatly reduce the tunnel collapse hazards. The key to achieve anti-collapse warning in soft and weak surrounding rock tunnel is to obtain anti-collapse warning standards. Therefore, it is necessary to study tunnel anti-collapse warning standards to guide safe tunnel construction. Research conclusions: (1) Deformation of the tunnel is relevant to hydrogeological conditions, construction method, construction progress and other factors. Currently, the standard values in criterion were not suitable for tunnel collapse warning. (2) It is practicable to achieve anti-collapse monitoring by relative deformation, because anti-collapse real-time monitoring focused on dome relative deformation differently from routine monitoring in soft and weak surrounding rock tunnel. (3) The reference value of tunnel anti-collapse real-time monitoring is determined by displacement limit value in criterion, the maximum value of the measured displacement in similar project and the measured data in tunnel project. (4) The field experiment indicated that the reference value could meet tunnel anti-collapse warning. Therefore, the research results can be applied to large cross-section tunnel of soft and weak surrounding rock.     

基于 LS-DYNA 的移动式压力容器侧翻碰撞分析

运用有限元和瞬态动力学的有关理论和方法对移动式压力容器动态侧翻的安全性进行了研究。首先采用三维建模软件建立了移动式压力容器运输车的实体模型,然后分别利用有限元分析软件ANSYS和瞬态动力学仿真软件LS-DYNA对模型进行前处理分析和求解计算,得到满载车速为36 km/h时因过度转弯造成侧翻后,压力容器罐体、组合支座、车架及牵引销的动态应力响应情况。计算结果表明：运输车整体吸收冲击的能力较强,车架、支座起到了一定的缓冲作用,但压力容器焊缝的强度需要提高。     

基于刚度及模态分析的某微型车车身轻量化设计

利用Nastran软件建立了某微型车白车身的有限元分析模型,对其进行了刚度及模态分析.对比分析轻量化前、后的计算结果可知,轻量化后车身刚度和模态在可接受的范围内,达到了车身质量减轻的目的.试验验证表明,轻量化后有限元分析结果和实车试验结果一致性较高.     

位移反分析法在新加坡某综合娱乐城地铁深基坑工程中的应用

本文以新加坡滨海湾金沙综合娱乐城P8402标项目的深基坑开挖支护为例,通过ValetParking（北基坑）信息化施工监测数据的反馈,运用位移反分析法,实现北基坑减少一道钢支撑的施工设计优化。详细阐述了位移反分析法成功运用的过程,通过有限元数值分析法,分析了P8402工程中的设计优化过程,为位移反分析法的研究和应用提供...     

Nonlinear buckling analysis of pre-stressed ring-stiffened circular cylindrical shells under external pressure

This paper is concerned with the nonlinear buckling behavior of pre-stressed ring-stiffened thin circular cylindrical shells under external pressure. According to the geometrical nonlinearity, governing equations are derived by incorporating initial stresses based on Donnell-type shell theory. The “smeared stiffeners” approach is used for ring stiffeners. The numerical analyses are conducted by Gelerkin’s method to obtain critical buckling loads of shells. This study shows effects of initial stresses on stability of shells. Moreover, effects of initial stresses on buckling modes of shells are discussed.     

黄骅港三期工程装船机选型的研究与应用

对黄骅港三期工程码头装船机选型的研究分析及最终方案的确定进行了论述。装船机根据功能要求的不同分别采用不同的尾车形式,调整装船机回转中心,保证装船机能够满足码头南北两侧8个泊位的装船作业要求。     

高校德育实施策略研究

在完善目标、体系规划、规范管理、“两课”建设、实践环节、阵地建设等方面对高校德育的实施策略进行探讨,旨在进一步加强和改进高校德育工作,提高德育工作水平,实现育人目标。     

地铁盾构进出工作井的施工风险

进出工作井是盾构法施工中的一个事故多发环节.以上海轨道交通9号线1期桂林路站至宜山路站区间隧道工程为依托,采用层次分析法建立风险指标体系,基于多层次模糊综合评判模型进行风险评估,得到盾构进出工作井的主要环节的风险因素、风险等级及风险的模糊分布,结论对指导实际施工、保护周围环境、规范施工管理、减少社会及经济损失均有参考意义.     

对组建铁路货运公司的向点思考

概述了我国铁路改革总体思路，提出了我国铁路货运公司的组建方案及其运转保障机制，同时阐述了货运分公司经营与调度指挥和运输能力的关系。