【作者】 丁晓峰；

【导师】 吉晓民；

【作者基本信息】 西安理工大学 ， 机械设计及理论， 2004， 硕士

【摘要】 热气机是一种以多种燃料为能源的闭循环回热式发动机，在解决能源紧张、减少环境污染以及军事领域等方面具有重要意义。本文研究了菱形传动热气机的传动机构尺度优化综合、性能模拟以及利用虚拟样机技术对热气机进行建模，进而对其传动机构进行运动及动力模拟仿真，以检验各个参数的合理性。 首先，从Stirling热力学循环理论入手，根据热气机一个运动循环输出热功为最大。建立了菱形传动机构尺度优化综合的数学模型，在满足传动机构约束条件的情况下，优化传动机构的几何参数，以使热气机的输出功率在其它参数已定时达到最大。 其次，采用等温分析法对影响热气机的性能参数进行分析，并且以此为数学模型开发出菱形传动机构热气机性能模拟的软件包，以期在热气机制造以前能对其性能进行预测。 再次，根据机构尺度优化综合优化得到的机构参数，采用Solidworks软件对菱形传动机构热气机进行三维建模，在Cosmos／Motion环境中，对热气机虚拟样机模型进行运动及动力仿真，以检测优化参数和运动规律的合理性。 最后，在对热气机虚拟样机的运动及动力仿真模拟分析的基础上，根据所得的参数，对热气机的零部件进行反馈设计，以使虚拟样机能够更加真实地反映未来的物理样机。更多还原

【Abstract】 Stirling Engine(SE) is a kind of regenerative internal combustion engine with the characteristics of multi-fuel adaptability. It plays an important part to change the shortage of petroleum fuel, reduce the environmental pollution and to be used in military field etc.. The dimensional optimization and synthesis of rhombic driving SE, its performance simulation and modeling by virtual prototype were studied in this paper. In order to prove the rationality of the design parameters for the driving mechanism, the kinematical and dynamical simulation of the mechanism was carried out.Firstly, the mathematics model for dimensional synthesis of rhombic driving SE was established based on the circulating theories of Stirling thermodynamics. The objective function was to maximize the thermal power from the working medium in one cycle. In this way the output power of SE would be maximum when the other parameters have be determined and the parameters of driving mechanism satisfied the restrictive conditions.Secondly, the parameters relative to the performance of SE were analyzed according to Constant Temperature Process Method. A mathematics model was established based on the analysis results and a software package for performance simulation of SE was developed so that the performance could be predicted before a SE would be manufactured.Thirdly, the 3D model of the mechanism was established from the results of mechanism optimization by using SolidWbrks and the kinematical simulation was carried out on the support of Cosmos/Motion environment so that the rationality of the optimized parameters and the kinematical curves could be proved.Finally, the feedback design of the parts was carried out according to the simulation results of virtual SE prototype. By this method, the virtual prototype would be more close to the physical machine to be manufactured.更多还原