基于不确定性的液压泵壳体温度变化规律研究

Research on the Rules of the Hydraulic Pump Shell Temperature Variation Based on the Uncertainty

针对液压泵壳体缺少更加符合工程实际的温度变化定量研究问题,首先建立确定性状态下的热力学模型,然后根据随机因子法及求解函数数字特征的代数综合法,建立随机不确定性状态下的热力学模型.对两种热力学模型下的温度随时间变化规律进行了研究,得到温度期望随时间增加而变大,均方差随时间增加而变小的规律,拓展了液压泵热力学研究领域.

Aiming at the problem that the hydraulic pump shell lacks the quantitative research about the tempera- ture variation which is more in line with the engineering practice, this paper firstly estahlishes the thermodynamic model under certain state, then establishes the thermody- namic model of random uncertain state according to the ran- dom factor method and Algebra synthesis method of function digital characteristics. The temperature variation with time under the two kinds of thermodynamic model is studied and the law that the temperature expectation will increase with time and the mean square error will decrease with time. The study will expand the research field of hydraulic pump ther- modynamic.