Non-pneumatic tire appears to have advantages over traditional pneumatic tire in terms of flat proof and maintenance free.A mechanical elastic wheel(MEW) with a non-pneumatic elastic outer ring which functions as air ...Non-pneumatic tire appears to have advantages over traditional pneumatic tire in terms of flat proof and maintenance free.A mechanical elastic wheel(MEW) with a non-pneumatic elastic outer ring which functions as air of pneumatic tire was presented.The structure of MEW was non-inflatable integrated configuration and the effect of hinges was accounted for only in tension. To establish finite element model of MEW, various nonlinear factors, such as geometrical nonlinearity, material nonlinearity and contact nonlinearity, were considered. Load characteristic test was conducted by tyre dynamic test-bed to obtain force-deflection curve. And the finite element model was validated through load characteristic test. Natural dynamic characteristics of the MEW and its influencing factors were investigated based on the finite element model. Simulation results show that the finite element model closely matched experimental wheel. The results also show that natural frequency is related to ground constraints, material properties, loads and torques. Influencing factors as above obviously affect the amplitude of mode of vibration, but have little effect on mode of vibration shape. The results can provide guidance for experiment research, structural optimization of MEW.展开更多
提出一种针对石油化工领域实现优化控制的方法,对胜华炼油厂催化装置先进控制的总体结构进行了介绍,提出了运行平台和软总线的概念,阐述了基于DCS的先进控制软件的分层设计思想,重点介绍了运行平台设计中使用的OPC(OLE for Process Cont...提出一种针对石油化工领域实现优化控制的方法,对胜华炼油厂催化装置先进控制的总体结构进行了介绍,提出了运行平台和软总线的概念,阐述了基于DCS的先进控制软件的分层设计思想,重点介绍了运行平台设计中使用的OPC(OLE for Process Control)技术,详细论述了运行平台的功能以及用lightOPC开发包设计运行平台的过程,说明了运行平台周围模块的设计方法,并将其在石油大学(华东)胜华炼油厂催化装置的先进控制系统上进行了应用,获得了较好的效果。展开更多
基金Project(NHA13002)supported by Explore Research Project of the General Armament Department,ChinaProject(11072106)supported by the National Natural Science Foundation of China
文摘Non-pneumatic tire appears to have advantages over traditional pneumatic tire in terms of flat proof and maintenance free.A mechanical elastic wheel(MEW) with a non-pneumatic elastic outer ring which functions as air of pneumatic tire was presented.The structure of MEW was non-inflatable integrated configuration and the effect of hinges was accounted for only in tension. To establish finite element model of MEW, various nonlinear factors, such as geometrical nonlinearity, material nonlinearity and contact nonlinearity, were considered. Load characteristic test was conducted by tyre dynamic test-bed to obtain force-deflection curve. And the finite element model was validated through load characteristic test. Natural dynamic characteristics of the MEW and its influencing factors were investigated based on the finite element model. Simulation results show that the finite element model closely matched experimental wheel. The results also show that natural frequency is related to ground constraints, material properties, loads and torques. Influencing factors as above obviously affect the amplitude of mode of vibration, but have little effect on mode of vibration shape. The results can provide guidance for experiment research, structural optimization of MEW.
文摘提出一种针对石油化工领域实现优化控制的方法,对胜华炼油厂催化装置先进控制的总体结构进行了介绍,提出了运行平台和软总线的概念,阐述了基于DCS的先进控制软件的分层设计思想,重点介绍了运行平台设计中使用的OPC(OLE for Process Control)技术,详细论述了运行平台的功能以及用lightOPC开发包设计运行平台的过程,说明了运行平台周围模块的设计方法,并将其在石油大学(华东)胜华炼油厂催化装置的先进控制系统上进行了应用,获得了较好的效果。
