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骆燕燕 , 刘旭阳 , 郝杰 , 等 . 航空电连接器热疲劳失效机理研究 [J ] . 兵工学报 , 2016 , 37 ( 7 ): 1266 - 1274 . DOI: 10.3969/j.issn.1000-1093.2016.07.015 http://doi.org/10.3969/j.issn.1000-1093.2016.07.015 电连接器插孔是弹性元件，在交变热应力的作用下易产生热疲劳，出现应力松弛现象，从而影响电连接器的接触可靠性。结合加速寿命试验理论，提出了一种电连接器热疲劳试验方案,设计了试验电路并进行了试验，分析了电连接器的热疲劳失效机理。试验结果表明：试品的接触电阻值随温度循环次数的增加而缓慢增长，其宏观原因是插孔收口处孔径增加，接触件间接触力减小；循环应力中温差或温度变化率的增加，会加速连接器接触电阻的增长。试验后试品插孔的金相分析发现: 温度循环条件下，连接器插孔中微观组织结构的变化，即插孔中的α相晶粒尺寸和滑移线密度均有所增加，滑移方向差异化程度增强，是导致其接触可靠性和性能逐步蜕化的根本原因；温差范围与温度变化率对电连接器性能蜕化的综合作用取决于滑移线密度与滑移方向差异化程度的“对抗”结果。

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MA T , WANG Z T , ZHANG X , et al . On thermal property of reduction gear for electrical transmission system of tracked vehicle [J ] . Acta Armamentarii , 2021 , 42 ( 10 ): 2170 - 2179 . (in Chinese) DOI: 10.3969/j.issn.1000-1093.2021.10.012 http://doi.org/10.3969/j.issn.1000-1093.2021.10.012 For improving the running stability of tracked vehicles，the thermal property of reduction gear for electrical transmission system of tracked vehicle is studied by 1D and 3D methods. 1D software is used to calculate the outlet pressure and flow rate of each lubrication and cooling orifice of reduction gear as well as the power loss and heat transfer path of reduction gear. The lubrication flow field and temperature field are simulated to obtain the temperature distribution of reduction gear by using 3D software.The research process of thermal properties of mechanical components in electric drive system of tracked vehicle is explored. The research process shows the advantages of 1D/3D software combined simulation method for the analysis of gear thermal property. It improves the accuracy of simulation results and shortens the simulation time.

李晔 , 李琦 , 范涛 , 等 . 电传动车辆用永磁电机定子绕组等效导热系数获取方法 [J ] . 兵工学报 , 2021 , 42 ( 10 ): 2215 - 2222 . DOI: 10.3969/j.issn.1000-1093.2021.10.017 http://doi.org/10.3969/j.issn.1000-1093.2021.10.017 永磁电机以其高功率密度的优点广泛应用于各种电传动场合，电机绕组温升是决定电机额定功率的重要因素。在电机热分析模型中，绕组模型的等效物性确定是最困难的。采用一种基于电机整机试验的绕组等效热物性拟合方法，并与等效绕组样件测量方法和绕组完整导线模型仿真方法进行对比。试验验证结果表明：受测试条件的限制，绕组样件的应用范围受限；绕组完整导线模型仿真因没有考虑浸渍漆填充效率评估温升偏小，但在设计阶段可以使用；绕组等效热物性拟合方法的准确性较高；该热评估方法可以准确、快速对电机进行热评估，为确定绕组简化模型等效导热系数提出解决方案。

LI Y , LI Q , FAN T , et al . Acquisition method for equivalent thermal conductivity coefficient of stator winding of permanent magnet motor [J ] . Acta Armamentarii , 2021 , 42 ( 10 ): 2215 - 2222 . (in Chinese) DOI: 10.3969/j.issn.1000-1093.2021.10.017 http://doi.org/10.3969/j.issn.1000-1093.2021.10.017 Permanent magnet motor is widely used in various electric drive applications because of its high power density. The temperature rise of motor winding is an important factor to determine the rated power of motor. In the thermal analysis model of motor，it is the most difficult to determine the equivalent physical properties of winding model.A fitting method of equivalent thermophysical properties of winding based on motor test is proposed and compared with the measurement method of equivalent winding sample and the simulation method of complete winding wire model. Through the test verification，the winding sample is limited by the test conditions and its application scope is limited.The temperature rise of the whole wire model is small because the filling efficiency of impregnating varnish is not considered，but it can be used in the design stage. The fitting method of equivalent thermophysical properties of winding has high accuracy.Through verification，the proposed thermal evaluation method can accurately and quickly evaluate the thermophysical properties of motor winding，and a solution is proposed to determine the equivalent thermal conductivity of the simplified winding model.

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