基于AMESim的农用发动机冷却散热器仿真与优化设计

Simulation and Optimization Design of Agricultural Engine Cooling Radiator Based on AMESim

以典型农用发动机冷却系统为研究对象,开展了基于AMESim仿真软件的建模、仿真分析与核心部件优化设计研究.在对发动机冷却系统基本结构及工作原理的分析基础上,应用AMESim软件中的冷却系统库、热力库、热液压库及信号控制库建立了发动机冷却系统的一维仿真模型.首先通过仿真计算分析发动机冷却系统中散热器的工作性能,并通过仿真值与试验值的对比,证实了所建立的AMESim仿真模型的可靠性,为冷却系统关键部件优化设计提供了模型与技术支持.然后,进行冷却系统散热器有效正面积优化设计的仿真研究.结果表明,发动机冷却系统对散热器的宽度更敏感,合理增大散热器有效正面积可以提高冷却系统对发动机的冷却效果.

Exploring the dynamic and economic performance of tractors under farmland working condition is of great significance for effectively improving the rationality of the matching of agricultural tractor powertrains.Firstly,the performance evaluation indicators under the tractor farmland working conditions were defined.Then,by using Cruise software to build a tractor simulation model under farmland conditions,and according to the actual performance simulation requirements,the corresponding calculation tasks were set in the software,and the simulation analysis of the dynamic and economic performance of the agricultural tractor was completed.Finally,the corresponding real vehicle test is carried out,the verification of the simulation model is completed,and the accuracy of the built tractor simulation model is verified.The simulation results show that the tractor power output can better adapt to the loading characteristics and soil specificity of agricultural machinery,and has certain power potential,which reflects better dynamic performance.And good fuel economy is achieved when the tractor is in low gear and high gear and high engine speed.Finally,the corresponding real vehicle test is carried out,the verification of the simulation model is completed,and the accuracy of the built tractor simulation model is verified,which is the reference for the optimization of the matching model of the tractor power transmission system.This model provides a model reference for the optimization and matching of tractor powertrains.