4D技术的发展和应用给建设项目带来了巨大的效益,但目前用于4D模拟的3D模型一般在施工前创建,4D模拟的应用局限于施工前的计划阶段。为将4D模拟的应用扩展至项目施工阶段,对4D模拟的3D模型进行研究,着重对比分析施工模型和实时施工模型...4D技术的发展和应用给建设项目带来了巨大的效益,但目前用于4D模拟的3D模型一般在施工前创建,4D模拟的应用局限于施工前的计划阶段。为将4D模拟的应用扩展至项目施工阶段,对4D模拟的3D模型进行研究,着重对比分析施工模型和实时施工模型,研究BIM(Building Information Modeling,建筑信息模型)模型的自动创建技术。研究发现,自动化创建的BIM实时施工模型可以动态的跟踪项目进展情况,能提高模型的准确性和减少建模工作量。提出基于BIM实时施工模型的4D模拟,是一个动态的4D模拟过程,可作为项目施工全过程的动态控制的有效工具,能进一步提高建设项目的效率和效益。展开更多
Parametric modeling of the impeller which drove a small wind device was built by knowledge fusion technology.NACA2410 airfoil blade was created by KF language.Using technology of UG/KF secondary development for the au...Parametric modeling of the impeller which drove a small wind device was built by knowledge fusion technology.NACA2410 airfoil blade was created by KF language.Using technology of UG/KF secondary development for the automatic modeling of wind turbine blade,the program can read in the airfoil data files automatically and the impeller model entity can be generated automatically.In order to modify the model,the aerodynamic characteristics of the impeller were analyzed for getting aerodynamic parameters by Fluent.The maximum force torch and best parameters of impeller were calculated.A physical prototype impeller was manufactured and the correctness of the design was verified,and the error of force torch between simulation and experimental results is about 10%.Parameterization design of the impeller model greatly improves the efficiency of modeling and flexibility of the CAD system.展开更多
文摘4D技术的发展和应用给建设项目带来了巨大的效益,但目前用于4D模拟的3D模型一般在施工前创建,4D模拟的应用局限于施工前的计划阶段。为将4D模拟的应用扩展至项目施工阶段,对4D模拟的3D模型进行研究,着重对比分析施工模型和实时施工模型,研究BIM(Building Information Modeling,建筑信息模型)模型的自动创建技术。研究发现,自动化创建的BIM实时施工模型可以动态的跟踪项目进展情况,能提高模型的准确性和减少建模工作量。提出基于BIM实时施工模型的4D模拟,是一个动态的4D模拟过程,可作为项目施工全过程的动态控制的有效工具,能进一步提高建设项目的效率和效益。
基金Project(gjd-09041)supported by the Natural Science Foundation of Shanghai Municipal Education Commission,China
文摘Parametric modeling of the impeller which drove a small wind device was built by knowledge fusion technology.NACA2410 airfoil blade was created by KF language.Using technology of UG/KF secondary development for the automatic modeling of wind turbine blade,the program can read in the airfoil data files automatically and the impeller model entity can be generated automatically.In order to modify the model,the aerodynamic characteristics of the impeller were analyzed for getting aerodynamic parameters by Fluent.The maximum force torch and best parameters of impeller were calculated.A physical prototype impeller was manufactured and the correctness of the design was verified,and the error of force torch between simulation and experimental results is about 10%.Parameterization design of the impeller model greatly improves the efficiency of modeling and flexibility of the CAD system.
