ID 原文 译文
14745 通过DPM模拟二相流（粉煤灰—空气）在旋流输送条件下管道收缩角对旋流管道输灰冲蚀特性,选用Tabakoff颗模粒与管壁碰撞型获取收缩管收缩角在8～25°旋流输送粉煤灰对管道输灰产生的冲蚀效应。 Using DPM to simulate the two-phase flow under the condition of swirling transportation, the shrinkage angle of the pipe affects the erosion characteristics of the ash transportation of the swirling pipe. The collision type of Tabakoff particles with the pipe wall is selected to obtain the shrinkage angle of the shrinking pipe at 8～ 25° Swirl conveying fly ash has an erosion effect on pipeline ash conveying.
14746 研究表明:1)气体在入料管与输运管交界面处产生加强粉煤灰混合的旋涡,粉煤灰初始混合气体在沿着旋流方向集中冲击管道内壁。 The research shows that: 1) The gas produces a vortex that strengthens the mixing of fly ash at the interface between the feed pipe and the transport pipe. The initial mixed gas of fly ash concentrates on the inner wall of the pipe along the direction of the swirl.
14747 2)收缩角在8～25°内最大冲蚀率是最小冲蚀率的1.5倍,最小冲蚀率所对应的收缩角为15°数值为2×10-4Kg（m2·s）-1。 2) The maximum erosion rate of the shrinkage angle within 8～25 ° is 1.5 times the minimum erosion rate, and the shrinkage angle corresponding to the minimum erosion rate is 15°. The value is 2×10-4 Kg(m2·s)-1.
14748 基于机器视觉的植保无人机障碍物检测技术是植保无人机自主飞行的关键技术。 Obstacle detection technology of plant protection UAV Based on machine vision is the key technology of autonomous flight of plant protection UAV.
14749 本文对基于机器视觉的植保无人机障碍物检测算法进行了分析和研究,并给出了仿真实验,通过实验分析找出了较优的植保障碍物检测算法,为植保无人机自主飞行提供了良好的技术基础。 In this paper, the obstacle detection algorithm of plant protection UAV Based on machine vision is analyzed and studied, and the simulation experiment is given. Through the experimental analysis, the better obstacle detection algorithm of plant protection UAV is found, which provides a good technical basis for autonomous flight of plant protection UAV.
14750 不同风向角的变化会导致外墙光伏阵列受到不同的风载荷。 Changes in different wind direction angles will cause different wind loads on the outer wall photovoltaic array.
14751 本文利用CFD对模型进行有限元分析,分析不同风向角对阵列的升力及周边流场的影响。 This paper uses CFD to perform finite element analysis on the model, and analyzes the influence of different wind direction angles on the lift of the array and the surrounding flow field.
14752 结果表明:在小风角下阵列所受载荷较大,其中0°风角为最危险风角,光伏建筑的顶楼所受在载荷较大,此外风向角的改变对光伏阵列周围流场同样有着较大的影响,因此在光伏板安装时要着重考虑在0°风角下及顶楼所安装支架的稳定性。 The results show that the load on the array is relatively large under small wind angles, among which the wind angle of 0° is the most dangerous wind angle, and the top floor of the photovoltaic building receives a relatively large load. In addition, the change of the wind direction angle has the same effect on the flow field around the photovoltaic array. Greater impact, Therefore, when installing photovoltaic panels, the stability of the brackets installed under the wind angle of 0° and on the top floor should be considered.
14753 首先在SolidWorks中构建3PSS/PRRR空间模型,并对模型加以描述,然后运用机构拓扑学分析其方位特征集,得出该机构具有三平移一转动的自由度,并运用Grübler-Kutzbach公式验证拓扑结构的正确性。其次赋予动、定平台实际的物理参数并在平台中心建立坐标系,运用坐标转换法与封闭矢量法计算并联机构反解方程,得出动平台与四条驱动杆之间的位姿关系。 Firstly, a 3PSS/PRRR space model was constructed in SolidWorks and described. Then, the azi muth feature set of the mechanism was analyzed by using the mechanism topology. It was found that the mechanism had three translational and one rotational degrees of freedom, and the correctness of the to pology was verified by Grubler-Kutzbach formula.Secondly, the actual physical parameters of the movin g platform and the fixed platform are given and the coordinate system is established in the center of the platform.
14754 最后在Adams中添加约束条件得到3PSS/PRRR运动学仿真曲线云图,进一步证实3PSS/PRRR并联机构为无并联冗余约束且运动性能良好。 The inverse equation of the parallel mechanism is calculated by the coordinate transfor mation method and the closed vector method, and the position and posture relationship between the movi ng platform and the four driving rods is obtained.Finally, the 3 PSS/PRRR kinematic simulation curve c loud map was obtained by adding constraint conditions in ADAMS, which further confirmed that the 3 PSS/PRRR parallel mechanism has no parallel redundant constraints and good kinematic performace.