8米后置客车行驶左右摇晃原因探讨

针对某6820型后置旅行客车行驶过程中出现的车身摇晃现象，设计人员简要地从悬架系统的配置及布置方式对故障产生原因进行了分析与探讨。     

Assessment of the volume of fluid method for free-surface wave flow

This study was concerned with the free-surface wave flow around a surface-piercing foil. The volume of fluid method implemented in a Navier–Stokes computational fluid dynamics code was employed. Three widely used discretization schemes for the volume of fluid method were assessed for a test case that involved general ship waves, spilling breaking waves in front of the leading edge, and bubbly free surfaces in separated regions. A single computational approach was selected for the comparison, and a grid-dependence study was carried out. The computational results were validated against existing experimental data, showing good agreement. The validation results suggest that all three discretization schemes perform well, but the best and most efficient results were obtained using the high-resolution interface capturing scheme.     

电渗法处治过湿土路基填料现场模型试验

电渗法处治过湿土路基填料是一项土工新技术。通过河北省大广高速公路京衡段电渗法处治过湿土现场模型试验,揭示过湿土现场含水量、电流密度和温度随电渗法处治时间而变化的规律,得出施工可行性结论,可为电渗技术在路基中的应用奠定基础。     

软式透水管法对路堑路面水毁治理的技术研究

软式透水管法用于防治路堑路面的地下水水毁,简单易行,经济合理,便于维修和清理,在高路堑混凝土路面的设计、施工和养护工作中是一个比较值得借鉴和推广的方法。     

最低评标价法在工程招标中的应用

实行合理最低评标价法是一项系统工程,需要项目法人负责制、建设监理、合同管理、工程风险管理（工程保险和工程保证担保）、资质管理、工程质量监督管理等制度的配套,在实施过程中应予以综合考虑。     

城市可持续交通系统的研究

通过对国内外可研成果的分析和研究,结合沈阳市的实际情况,分析了沈阳市交通系统现状和存在问题,明确了沈阳城市可持续交通系统的影响因素和指标体系,制定了沈阳市可持续交通系统的实现方法。     

浅埋暗挖平顶直墙大断面隧道施工变形控制

结合北京地铁八号线安德里北街站1号风道工程,对平顶直墙大断面隧道在浅埋暗挖法施工条件下的变形及其控制措施进行分析.采用有限元分析软件ANSYS分别对2种支护方案进行模拟分析.方案一：采用格栅钢架、钢筋网加喷射混凝土的初期支护措施；方案二：在方案一基础上加设大管棚和小导管注浆超前支护措施.另外,还对模拟结果与现场监测数据进行对比分析.通过分析得出：采用方案二的支护措施施工浅埋暗挖平顶直墙大断面隧道,可以控制变形量值在要求的范围内,达到安全施工的目的.     

基于SolidWorks垃圾车厢体有限元分析技巧

介绍了运用SolidWorks软件对垃圾车厢体进行有限元分析的一般方法。着重阐述了分析思路以及在分析过程中的建模、网格划分、载荷定义、零件接触等方面的技巧。     

Analysis on Ground Surface Deformation and Influence of Construction Parameters Caused by Two Different Shield Machines in Double-tube Tunnelling北大核心CSCD

Based on a shield-driven running tunnel project of Hangzhou Metro Line 2, this paper carries out field measuring of the ground surface deformation caused by two different shield machines in double-tube tunnelling in soft soil areas, obtains the laws of the surface deformation caused by shield-driven double-tube tunnelling and verifies the applicability of the modified Peck formula to double-tube tunnelling. The results show that in soft soil areas the impacts on ground surface deformation caused by different shield construction parameters in the previously and subsequently excavated tunnels are different, while the surface deformation changes sharply before and after the shield machine passing through the cutting face, and a rebound phenomenon occurs when the shield tail passes through the cutting face due to the influence of the grouting; The cutterhead torque of the shield machine in soft soil areas can be composed of five calculation factors, and the calculation results are in good agreement with the measured values. The larger the opening rate of the shield cutterhead is, the larger the average torque value will be, the higher the percentage of large ground loss rate will be, and the larger the maximum ground surface settlement will be; The ratio of cutterhead torque T to mucking volume per ring Q is used as the control parameter for analyzing the ground surface settlement, and a certain positive correlation between the ratio and the surface settlement value is determined, the smaller the cutterhead opening rate is, the more accurate the fitting results will be. © 2022, Editorial Office of "Modern Tunnelling Technology". All right reserved.     

卫星定位数据驱动的营运车辆驾驶人驾驶风险评估模型

为了提高营运车辆驾驶人安全管理的精细化水平，合理地评估驾驶人驾驶风险程度，有的放矢地降低高风险驾驶人的事故率，基于卫星定位数据特点及驾驶行为与驾驶风险的相关关系设计26个驾驶行为特征参数。考虑到高速和非高速行驶时相同驾驶行为对驾驶风险的影响区别较大，根据23名营运车辆驾驶人的实测数据有针对性地筛选高速和非高速路段驾驶人风险评估指标，构建营运车辆驾驶人驾驶风险评估指标体系。然后，基于熵权法、独立性权系数法和Spearman相关系数法建立集成赋权法，确定各评估指标的权重。最后，雇佣40名营运车辆驾驶人进行实车试验以验证模型的合理性。结果表明：车辆速度和加速度方面的驾驶行为特征可以用于评估驾驶人的驾驶风险且评估效果较好，驾驶风险评估得分与实际交通冲突次数呈正相关关系，所建立模型可以较为准确地评估营运车辆驾驶人驾驶风险的高低，准确率达到77.50%，该模型在不同地区使用时，准确率存在一定的差异，但在容许范围之内，方法具有较好的鲁棒性。