This paper presents a cloud-based data-driven design optimization system,named DADOS,to help engineers and researchers improve a design or product easily and efficiently.DADOS has nearly 30 key algorithms,including th...This paper presents a cloud-based data-driven design optimization system,named DADOS,to help engineers and researchers improve a design or product easily and efficiently.DADOS has nearly 30 key algorithms,including the design of experiments,surrogate models,model validation and selection,prediction,optimization,and sensitivity analysis.Moreover,it also includes an exclusive ensemble surrogate modeling technique,the extended hybrid adaptive function,which can make use of the advantages of each surrogate and eliminate the effort of selecting the appropriate individual surrogate.To improve ease of use,DADOS provides a user-friendly graphical user interface and employed flow-based programming so that users can conduct design optimization just by dragging,dropping,and connecting algorithm blocks into a workflow instead of writing massive code.In addition,DADOS allows users to visualize the results to gain more insights into the design problems,allows multi-person collaborating on a project at the same time,and supports multi-disciplinary optimization.This paper also details the architecture and the user interface of DADOS.Two examples were employed to demonstrate how to use DADOS to conduct data-driven design optimization.Since DADOS is a cloud-based system,anyone can access DADOS at www.dados.com.cn using their web browser without the need for installation or powerful hardware.展开更多
This paper presents the generalized reduced gradient method （GRG） and its realization forms. The application example of GRG in the optimization design of a single-stage cylindrical gear reducer is introduced. The al...This paper presents the generalized reduced gradient method （GRG） and its realization forms. The application example of GRG in the optimization design of a single-stage cylindrical gear reducer is introduced. The algo- rithm of the GRG method is realized in Vissim software. Based on the mathematical model of the single-stage cylin- drical gear reducer, the simulation structure of the optimization design was achieved. The experiment results show that the GRG method has fewer iterations and higher precision. The GRG method is very suitable for solving mechanical optimization design.展开更多
为了解决板料成形中起皱和拉裂的问题,以某汽车挡泥板为研究对象,基于Design-exper软件,建立了摩擦系数、压边力、拉延筋阻力系数与板料拉裂、起皱之间关系的数学模型。并利用该软件进行了多目标优化,得到了最佳的参数组合:摩擦系数为0....为了解决板料成形中起皱和拉裂的问题,以某汽车挡泥板为研究对象,基于Design-exper软件,建立了摩擦系数、压边力、拉延筋阻力系数与板料拉裂、起皱之间关系的数学模型。并利用该软件进行了多目标优化,得到了最佳的参数组合:摩擦系数为0.13,压边力为350 k N,拉延筋阻力系数为35%。通过有限元模拟和生产实践验证,证明了该方法的可行的。展开更多
In the design process of globoidal CAM mechanism,there are some shortcomings such as long structure design cycle,low efficiency,and no modification flexibility of parameters of similar parts.NX Open classic applicatio...In the design process of globoidal CAM mechanism,there are some shortcomings such as long structure design cycle,low efficiency,and no modification flexibility of parameters of similar parts.NX Open classic application programming interfaces(APIS)can be connected with Microsoft Visual Studio(VS).Based on NX Open application,users can develop menus,toolbars,dialog boxes and other tools to realize interactive design.Users can also call input parameters through the dialog box callback function,then activate the corresponding control application(callback function)by C++programming language and NX Open API complete code.Based on the secondary development function of UG software and VS,a digital design system suitable for high efficiency modeling of globoidal indexing CAM mechanism was developed to complete the human-machine interface interaction design.The results show that comparing the digital design system with the traditional design,the system after parametric design can not only greatly shorten the design time,but also reduce the tedious repetitive work,which proves the superiority and feasibility of the digital design.展开更多
Simulation is a powerful technique in evaluating and improving the performance of complex systems.In order to improve the efficiency of simulation experiment design,analysis and evaluation,auxiliary tools are required...Simulation is a powerful technique in evaluating and improving the performance of complex systems.In order to improve the efficiency of simulation experiment design,analysis and evaluation,auxiliary tools are required.Unfortunately,existing tools are usually not meeting the requirements of simulation.Moreover,the restricted interfaces,reusability and expandability influence their efficiency to a certain extent.In this paper,an integrated software environment,HIT-SEDAES,is designed for solving these problems.A process model of simulation experiment design,analysis and evaluation is introduced to guide the development of the software environment.And several solutions are proposed to solve key problems in this development.Finally,an application is used to illustrate how the software environment works for the problems of model validation,effectiveness evaluation and performance analysis.展开更多
基金Supported by National Key Research and Development Program of China (Grant No.2018YFB1700704)National Natural Science Foundation of China (Grant No.52075068)。
文摘This paper presents a cloud-based data-driven design optimization system,named DADOS,to help engineers and researchers improve a design or product easily and efficiently.DADOS has nearly 30 key algorithms,including the design of experiments,surrogate models,model validation and selection,prediction,optimization,and sensitivity analysis.Moreover,it also includes an exclusive ensemble surrogate modeling technique,the extended hybrid adaptive function,which can make use of the advantages of each surrogate and eliminate the effort of selecting the appropriate individual surrogate.To improve ease of use,DADOS provides a user-friendly graphical user interface and employed flow-based programming so that users can conduct design optimization just by dragging,dropping,and connecting algorithm blocks into a workflow instead of writing massive code.In addition,DADOS allows users to visualize the results to gain more insights into the design problems,allows multi-person collaborating on a project at the same time,and supports multi-disciplinary optimization.This paper also details the architecture and the user interface of DADOS.Two examples were employed to demonstrate how to use DADOS to conduct data-driven design optimization.Since DADOS is a cloud-based system,anyone can access DADOS at www.dados.com.cn using their web browser without the need for installation or powerful hardware.
文摘This paper presents the generalized reduced gradient method （GRG） and its realization forms. The application example of GRG in the optimization design of a single-stage cylindrical gear reducer is introduced. The algo- rithm of the GRG method is realized in Vissim software. Based on the mathematical model of the single-stage cylin- drical gear reducer, the simulation structure of the optimization design was achieved. The experiment results show that the GRG method has fewer iterations and higher precision. The GRG method is very suitable for solving mechanical optimization design.
文摘为了解决板料成形中起皱和拉裂的问题,以某汽车挡泥板为研究对象,基于Design-exper软件,建立了摩擦系数、压边力、拉延筋阻力系数与板料拉裂、起皱之间关系的数学模型。并利用该软件进行了多目标优化,得到了最佳的参数组合:摩擦系数为0.13,压边力为350 k N,拉延筋阻力系数为35%。通过有限元模拟和生产实践验证,证明了该方法的可行的。
基金National Natural Science Foundation of China(51275210,51975251)Provi-ncial Industry-University-Research Joint Venture Project(1078081606192480)+1 种基金Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment Technology(FMZ2018Y2)Six Talent Peaks(1076010241131350)。
文摘In the design process of globoidal CAM mechanism,there are some shortcomings such as long structure design cycle,low efficiency,and no modification flexibility of parameters of similar parts.NX Open classic application programming interfaces(APIS)can be connected with Microsoft Visual Studio(VS).Based on NX Open application,users can develop menus,toolbars,dialog boxes and other tools to realize interactive design.Users can also call input parameters through the dialog box callback function,then activate the corresponding control application(callback function)by C++programming language and NX Open API complete code.Based on the secondary development function of UG software and VS,a digital design system suitable for high efficiency modeling of globoidal indexing CAM mechanism was developed to complete the human-machine interface interaction design.The results show that comparing the digital design system with the traditional design,the system after parametric design can not only greatly shorten the design time,but also reduce the tedious repetitive work,which proves the superiority and feasibility of the digital design.
基金supported by the National Natural Science Foundation of China(61403097)the Fundamental Research Funds for the Central Universities(HIT.NSRIF.2015035).
文摘Simulation is a powerful technique in evaluating and improving the performance of complex systems.In order to improve the efficiency of simulation experiment design,analysis and evaluation,auxiliary tools are required.Unfortunately,existing tools are usually not meeting the requirements of simulation.Moreover,the restricted interfaces,reusability and expandability influence their efficiency to a certain extent.In this paper,an integrated software environment,HIT-SEDAES,is designed for solving these problems.A process model of simulation experiment design,analysis and evaluation is introduced to guide the development of the software environment.And several solutions are proposed to solve key problems in this development.Finally,an application is used to illustrate how the software environment works for the problems of model validation,effectiveness evaluation and performance analysis.
