方位(导航)
热的
瞬态(计算机编程)
边值问题
热接触电导
机床
热分析
刚度
边界(拓扑)
机械
结构工程
机械工程
工程类
材料科学
计算机科学
热阻
热力学
物理
数学
人工智能
数学分析
操作系统
量子力学
作者
Haitong Wang,Yonglin Cai,Heng Wang
标识
DOI:10.5194/ms-8-277-2017
摘要
Abstract. This paper presents a dynamic thermal-mechanical model to investigate the thermal characteristics in a spindle-bearing system. In this model, transient thermal analysis, static structure analysis and calculation of the boundary conditions are conducted as a solution loop. The transient boundary conditions, such as bearing stiffness, bearing heat generation and thermal contact conductance, are calculated with the appropriate formulas and solution methodology. The thermal feedbacks, which are seldom considered in the previous studies, are calculated in details. In order to validate the prediction accuracy, thermal equilibrium experiment is conducted on a test rig of spindle-bearing system. The predictions of the proposed model, such as bearing preload, temperature and thermal displacements, are in close agreement with the experiment results. The comparisons of the proposed model with two traditional simulations show that, the thermal feedbacks on the boundary conditions and thermal contact conductance are of great importance to the real-time estimation of the thermal characteristics. The proposed model provides a practical method to improve the prediction accuracy. It could also be generalized in other mechanical systems to investigate the dynamic thermal characteristics.
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