This study describes an integrated framework in which basic aerospace engineering aspects(performance, aerodynamics, and structure) and practical aspects(configuration visualization and manufacturing) are coupled and ...This study describes an integrated framework in which basic aerospace engineering aspects(performance, aerodynamics, and structure) and practical aspects(configuration visualization and manufacturing) are coupled and considered in one fully automated design optimization of rotor blades. A number of codes are developed to robustly perform estimation of helicopter configuration from sizing, performance analysis, trim analysis, to rotor blades configuration representation. These codes are then integrated with a two-dimensional airfoil analysis tool to fully design rotor blades configuration including rotor planform and airfoil shape for optimal aerodynamics in both hover and forward flights. A modular structure design methodology is developed for realistic composite rotor blades with a sophisticated cross-sectional geometry. A D-spar cross-sectional structure is chosen as a baseline. The framework is able to analyze all realistic inner configurations including thicknesses of D-spar, skin, web, number and ply angles of layers of each composite part,and materials. A number of codes and commercial software(ANSYS, Gridgen, VABS, Pre VABS,etc.) are implemented to automate the structural analysis from aerodynamic data processing to sectional properties and stress analysis. An integrated model for manufacturing cost estimation ofcomposite rotor blades developed at the Aerodynamic Analysis and Design Laboratory(AADL),Aerospace Information Engineering Department, Konkuk University is integrated into the framework to provide a rapid and dynamic feedback to configuration design. The integration of three modules has constructed a framework where the size of a helicopter, aerodynamic performance analysis, structure analysis, and manufacturing cost estimation could be quickly investigated. All aspects of a rotor blade including planform, airfoil shape, and inner structure are considered in a multidisciplinary design optimization without an exception of critical configuration.展开更多
Aiming to maximize the aerodynamic performance of the Distributed Electric Propulsion(DEP)aircraft,a hybrid design framework which focuses on the aerodynamic performance of the propeller/wing integration has been deve...Aiming to maximize the aerodynamic performance of the Distributed Electric Propulsion(DEP)aircraft,a hybrid design framework which focuses on the aerodynamic performance of the propeller/wing integration has been developed and validated numerically.Variable-fidelity modelling for propeller aerodynamics has been used to achieve computational efficiency with reasonable accuracy.By optimizing the aerodynamic loading distributions on the tractor propeller disk,the induced slipstream is redistributed into a form that is beneficial for the wing downstream,based on which the propeller blade geometry is generated through a rapid inversed design procedure.As compared with the Minimum Induced Loss(MIL)propeller at a specified thrust level,significant improvements of both the lift-to-drag ratio of the wing and the propeller/wing integrated aerodynamic efficiency is achieved,which shows great promise to deliver aerodynamic benefits for the wing within the propeller slipstream without any additional devices.展开更多
设计施工一体化是对传统设计施工模式的转型与升级,是水利工程降本增效的有效手段。该模式有助于充分发挥设计单位的技术主导作用,同时简化多方协作链条,避免因行业管理结构割裂和流程碎片化导致的资源浪费与效率低下等问题。受限于我...设计施工一体化是对传统设计施工模式的转型与升级,是水利工程降本增效的有效手段。该模式有助于充分发挥设计单位的技术主导作用,同时简化多方协作链条,避免因行业管理结构割裂和流程碎片化导致的资源浪费与效率低下等问题。受限于我国当前水利工程建设管理体制,大坝工程设计与施工一体化程度相对不高,现场施工与既定设计方案之间往往存在偏差,同时存在设计施工协同难度大、管理颗粒度不一致、信息共享效率低、标准化程度不高、管控过程人为因素干扰大等问题。建筑信息模型(Building Information Modeling,BIM)作为一种以信息模型为载体、以数据共享为目标、以应用分析为核心的集成式信息化技术,为构建数字孪生水利工程和实现智慧化仿真提供了关键支撑。BIM技术具有可视化、协同性、模拟性、优化性、可出图性和信息完备等特性,能够显著提升设计效率和设计施工协同管理水平,已成为智能大坝建设核心支撑技术之一。开展基于BIM技术的大坝设计施工一体化管理平台架构研究,是提升大坝设计施工一体化管理能力、推进智能大坝建设的有效举措。展开更多
Urbanisation presents complex challenges,including optimising land use,managing transportation networks,and ensuring equitable resource distribution.Artificial intelligence(AI)offers transformative solutions that enab...Urbanisation presents complex challenges,including optimising land use,managing transportation networks,and ensuring equitable resource distribution.Artificial intelligence(AI)offers transformative solutions that enable data-driven urban planning to improve efficiency and address system interdependencies.Despite advancements across various domains,fragmented AI implementation has limited the ability to address broader urban challenges.This paper proposes an AI-powered framework for optimising and reshaping urban spaces,underpinned by interdisciplinary integration and human-centered design.The framework combines data-driven decision-making,adaptive technologies,and participatory mechanisms to address current gaps and foster more cohesive urban systems.By prioritising inclusivity,adaptability,and sustainability,this framework offers a path toward creating resilient and inclusive urban environments.Future research should explore multi-dimensional data integration,adaptive systems,and stakeholder engagement in realizing AI’s full potential in shaping the cities of tomorrow.展开更多
基金supported by the National Foundation for Science and Technology Development (NAFOSTED) of Vietnam (No. 107.04-2012.25)
文摘This study describes an integrated framework in which basic aerospace engineering aspects(performance, aerodynamics, and structure) and practical aspects(configuration visualization and manufacturing) are coupled and considered in one fully automated design optimization of rotor blades. A number of codes are developed to robustly perform estimation of helicopter configuration from sizing, performance analysis, trim analysis, to rotor blades configuration representation. These codes are then integrated with a two-dimensional airfoil analysis tool to fully design rotor blades configuration including rotor planform and airfoil shape for optimal aerodynamics in both hover and forward flights. A modular structure design methodology is developed for realistic composite rotor blades with a sophisticated cross-sectional geometry. A D-spar cross-sectional structure is chosen as a baseline. The framework is able to analyze all realistic inner configurations including thicknesses of D-spar, skin, web, number and ply angles of layers of each composite part,and materials. A number of codes and commercial software(ANSYS, Gridgen, VABS, Pre VABS,etc.) are implemented to automate the structural analysis from aerodynamic data processing to sectional properties and stress analysis. An integrated model for manufacturing cost estimation ofcomposite rotor blades developed at the Aerodynamic Analysis and Design Laboratory(AADL),Aerospace Information Engineering Department, Konkuk University is integrated into the framework to provide a rapid and dynamic feedback to configuration design. The integration of three modules has constructed a framework where the size of a helicopter, aerodynamic performance analysis, structure analysis, and manufacturing cost estimation could be quickly investigated. All aspects of a rotor blade including planform, airfoil shape, and inner structure are considered in a multidisciplinary design optimization without an exception of critical configuration.
基金supported by the Key Research and Development Program of Shaanxi Province of China(No.2018ZDCXL-GY-03-04)。
文摘Aiming to maximize the aerodynamic performance of the Distributed Electric Propulsion(DEP)aircraft,a hybrid design framework which focuses on the aerodynamic performance of the propeller/wing integration has been developed and validated numerically.Variable-fidelity modelling for propeller aerodynamics has been used to achieve computational efficiency with reasonable accuracy.By optimizing the aerodynamic loading distributions on the tractor propeller disk,the induced slipstream is redistributed into a form that is beneficial for the wing downstream,based on which the propeller blade geometry is generated through a rapid inversed design procedure.As compared with the Minimum Induced Loss(MIL)propeller at a specified thrust level,significant improvements of both the lift-to-drag ratio of the wing and the propeller/wing integrated aerodynamic efficiency is achieved,which shows great promise to deliver aerodynamic benefits for the wing within the propeller slipstream without any additional devices.
文摘设计施工一体化是对传统设计施工模式的转型与升级,是水利工程降本增效的有效手段。该模式有助于充分发挥设计单位的技术主导作用,同时简化多方协作链条,避免因行业管理结构割裂和流程碎片化导致的资源浪费与效率低下等问题。受限于我国当前水利工程建设管理体制,大坝工程设计与施工一体化程度相对不高,现场施工与既定设计方案之间往往存在偏差,同时存在设计施工协同难度大、管理颗粒度不一致、信息共享效率低、标准化程度不高、管控过程人为因素干扰大等问题。建筑信息模型(Building Information Modeling,BIM)作为一种以信息模型为载体、以数据共享为目标、以应用分析为核心的集成式信息化技术,为构建数字孪生水利工程和实现智慧化仿真提供了关键支撑。BIM技术具有可视化、协同性、模拟性、优化性、可出图性和信息完备等特性,能够显著提升设计效率和设计施工协同管理水平,已成为智能大坝建设核心支撑技术之一。开展基于BIM技术的大坝设计施工一体化管理平台架构研究,是提升大坝设计施工一体化管理能力、推进智能大坝建设的有效举措。
文摘Urbanisation presents complex challenges,including optimising land use,managing transportation networks,and ensuring equitable resource distribution.Artificial intelligence(AI)offers transformative solutions that enable data-driven urban planning to improve efficiency and address system interdependencies.Despite advancements across various domains,fragmented AI implementation has limited the ability to address broader urban challenges.This paper proposes an AI-powered framework for optimising and reshaping urban spaces,underpinned by interdisciplinary integration and human-centered design.The framework combines data-driven decision-making,adaptive technologies,and participatory mechanisms to address current gaps and foster more cohesive urban systems.By prioritising inclusivity,adaptability,and sustainability,this framework offers a path toward creating resilient and inclusive urban environments.Future research should explore multi-dimensional data integration,adaptive systems,and stakeholder engagement in realizing AI’s full potential in shaping the cities of tomorrow.
