Since the last IAEA-FEC in 2021, significant progress on the development of long pulse steady state scenario and its related key physics and technologies have been achieved, including the reproducible 403 s long-pulse steady-state H-mode plasma with pure radio frequency (RF) power heating. A thousand-second time scale (similar to 1056 s) fully non-inductive plasma with high injected energy up to 1.73 GJ has also been achieved. The EAST operational regime of high beta(P) has been significantly extended (H-98y2 > 1.3, beta(P) similar to 4.0, beta(N) similar to 2.4 and n(e)/n(GW) similar to 1.0) using RF and neutral beam injection (NBI). The full edge localized mode suppression using the n = 4 resonant magnetic perturbations has been achieved in ITER-like standard type-I ELMy H-mode plasmas with q(95) approximate to 3.1 on EAST, extrapolating favorably to the ITER baseline scenario. The sustained large ELM control and stable partial detachment have been achieved with Ne seeding. The underlying physics of plasma-beta effect for error field penetration, where toroidal effect dominates, is disclosed by comparing the results in cylindrical theory and MARS-Q simulation in EAST. Breakdown and plasma initiation at low toroidal electric fields (<0.3 V m(-1)) with EC pre-ionization is developed. A beneficial role on the lower hybrid wave injection to control the tungsten concentration in the NBI discharge is observed for the first time in EAST suggesting a potential way toward steady-state H-mode NBI operation.

以矿用对旋除尘器为研究对象,针对弯掠叶片利用 CFD数值模拟分析不同的叶片类型对除尘器的气动性能的影响,然后设计正交试验分析不同的弯掠角度对除尘器的影响,通过MATLAB软件进行回归分析,得到最优角度组合.结论:相同工作条件,弯掠叶片可以达到最好的工作状态,实现最佳做工通过正交试验,得到弯掠叶片的最佳角度组合,气动性能提升,为今后除尘器制造提供理论支持.

In an attempt to solve the problems of the low intelligent distribution degree and high working intensity of auxiliary transportation systems in underground coal mines, an intelligent distribution strategy of materials in the whole mine is put forward. Firstly, combined with the characteristics of materials and standard containers, a three-dimensional loading model is established with the goal of maximizing the space utilization of standard containers, and a three-dimensional space segmentation heuristic algorithm is used to solve the material loading scheme. Then, the multi-objective optimization model of distribution parameters is established with the goal of the shortest delivery distance, the shortest delay time, and the fewest number of delivery vehicles, and the dual-layer genetic algorithm is used to solve the distribution scheme. Finally, the spatiotemporal conversion coefficient is designed to solve the task list by hierarchical clustering, and the solution time is reduced by 30%. The results show that the dual-layer genetic algorithm based on hierarchical clustering has good adaptability in complex material scheduling scenarios.

喷嘴内外流场特性直接影响着其降尘效率,而通过实验来获取相关参数有着成本较高,耗时长等缺点,而且很难在不影响流场情况下,测出内部参数.通过对螺旋喷嘴内外流场进行fluent数值模拟,得到其流动机理和流场特性.采用基于有限体积法的VOF方法来捕捉空气-水的两相界面,得到螺旋喷嘴流动机理以及背压对喷嘴雾化的影响规律.结果表明:螺旋喷嘴在工作时,在旋流室至喷嘴口会产生空气柱,且越靠近喷嘴口,空气柱直径也越大;在喷嘴空前端会形成涡流,使得雾滴会填入锥状雾场,变成实心锥;压力对雾化夹角以及通过喷嘴的质量流量在一定的范围内影响较大,但最终两数值都趋于稳定.此研究方法可以用来对螺旋雾化喷嘴的雾化特性进行研究及结果的估测,为以后此类喷嘴设计提供经验参考和理论依据.

针对提高KJS-Y降尘风机的除尘性能以便提高矿井下工作安全性,采用翼型设计方法和变环量设计方法对叶轮进行了理论优化,并建立优化前后降尘风机模型,利用流体力学软件FLUENT进行分析,得到其入口截面处压力、叶片表面静压分布和叶片周围涡流分布,将分析得到的结果相互比较.结果表明相对于初始叶轮,优化后的叶轮模型集流器入口截面负压提高了17.6％、动压提高了 12.9％、全压提高了 29.7％、全压效率提升了 39.9％,各项性能指标都有较大提升.

为提高研究生专业课程的课堂教学效果,提出以问题为导向的研究生教学模式.在以问题为导向教学的课前准备和课堂教学活动中,根据教学大纲的要求和教学内容的安排,首先设计相关的问题并分组布置,让学生在课前预习时针对问题进行独立思考.其次在课堂教学中以问题为导向,教师通过问题对学生进行引导,答疑解惑,学生通过小组讨论汇报问题解决方案,让学生都能结合自己的研究方向参与课堂.最后根据培养目标的达成度对教学效果进行考核.该方法在2020级研究生"矿山机械设计理论及应用"的课程教学中进行了实践,取得了满意的效果.

针对煤矿辅助运输人工调度处理突发事件不够及时,智能化程度低等问题,设计了一款煤矿辅助运输智能调度平台.首先根据煤矿实际情况,搭建辅助运输平台架构;然后结合UWB定位技术,实时定位辅助运输设备;使用特定接口协议传输所收集到的数据,平台处理分析后,得到有效数据,通过TCP/IP协议,对整个矿井的辅助运输设备及物料进行调度.该平台实现了井上智能调度井下设备运输物料、井上调度室实时监测井下物料、人员及设备的状态、设备数据统计分析、数字化管理.

为了提高降尘风机的除尘性能,解决降尘风机在运行中存在的全压和全压效率较低、降尘效果较差、能量损耗较大,经济效益较低等问题,通过改变KJS-Y型降尘风机叶片数量,采用流固耦合方法,对采用不同叶片数量的风机进行数值模拟试验仿真分析,计算得到风机的静压、动压、全压以及全压效率等气动性能指标,并通过比较与分析不同叶片数量风机的气动性能指标,以此来确定最佳叶片数量,并指出该研究可为确定降尘风机最佳叶片数量提供参考.

针对煤矿井下液压支柱自动搬运设备,对其机械臂部件进行设计与研究,利用理论知识和工程实践经验设计成折叠形式,并对其进行运动学分析.通过Adams软件对折叠臂部件进行运动学仿真模拟,来分析折叠臂的位移、速度、加速度等运动特性,再通过ANSYS软件分析其重要零部件的结构强度.结果表明:所设计的折叠臂部件工作时,其运动特性和结构强度均很好地满足设计要求,安全无误地完成搬运工作,减轻了井下工作人员的劳动强度.

针对煤矿井下环境复杂、电机车运输过程中有线监控部署不便、成本高、线路易损坏等问题,基于ZigBee、WiFi等无线通信技术,构建了无线异构通信网络.首先搭建了无线异构通信网络架构,在该架构基础上设计了电机车远程监测和控制系统,包括系统硬件连接组成和软件功能组成.对系统监测模块进行电机车的环境检测和车载监控无线传输测试,结果表明电机车监测和控制系统可实现电机车环境监测和监控视频无线传输,保证了电机车安全、可靠和高效的运输.

In order to improve the working efficiency of underground electric locomotive robots in complex geological coal mines and realize the automation of underground scheduling system, the scheduling model of electric locomotive robots is established based on the underground track layout. Firstly, the cooperative operation routes of different types of electric locomotive robots are planned based on deadlock-free and collision rules. Then, according to the planning route, the scheduling parameters are set, and the transportation mode of electric locomotive robots is determined as interlaced transportation. The scheduling model is proved to be conflict-free by theory. Then the scheduling parameters are optimized by simulation under the scheduling rules of electric locomotive robots. Finally, the practicability of the scheduling strategy is verified by experiments. The research shows that the scheduling strategy improves the transportation efficiency by 47.6 % compared with manual scheduling. It can organize the transportation activities of electric locomotive robots scientifically, safely and efficiently, ensure the orderly distribution work and improve the intelligent degree of transportation system.

工程教育专业认证课程培养目标的达成支撑毕业要求的达成,每一门课程的培养目标的达成是工程教育总培养目标达成的基础.文章通过对一门专业课程的培养目标的达成度的计算过程的详细分析,讨论该课程目标达成度计算方法的合理性,找出课程教学存在的问题,提出相应的改进措施,对课程大纲的修改提出指导意见.

以矿用对旋风水联动除尘器为研究对象,针对当前除尘效率低的问题,运用逆向工程建立叶片三维模型,再改变一、二级叶片个数和轴向间隙,应用计算流体力学软件CFX,对除尘器进行三维流场数值模拟,通过分析集流器入口压力和风量,确定了最佳叶片组合下的参数和轴向间隙,有效提高了除尘器的工作效率,降低了能源消耗.

针对当前KJS—Y系列降尘器效率低的问题,通过调整叶轮轴向间隙与径向间隙参数,分别对不同安装参数的降尘器进行数值模拟,通过数值模拟分析特定截面压力分布情况,确定了叶轮最佳安装参数,大大提高了降尘器的工作效率,同时降低了设计成本.

针对当前KJS-Y型降尘器工作过程中集流器口处的负压不足导致吸尘效果不明显的问题,分析得出降尘器叶轮的叶片安装角、叶片扭转角和叶片数为吸尘性能的关键影响因素,将降尘器集流器入口处平均压力值作为评价指标.借助ANSYS-CFX仿真软件,对叶轮的3个参数进行单因素实验和正交实验;并用MATLAB对实验结果进行回归分析,对最优方案进行仿真验证.研究结果表明:3个叶轮参数敏感程度从大到小分别是叶片数、安装角、扭转角,通过回归分析得到了降尘器叶轮最佳参数组合,有效提高了降尘器的吸尘效率.

为培养工科院校本科生分析和解决复杂工程问题的能力,有限元分析等软件课程的考核方式及成绩评定方法等已成为现代教育中亟待解决的新课题.以有限元分析软件课程为例,提出一种适用于考查类课程的新型考查方式及成绩评定方法.这种评分准则具有良好的反馈结果,并能在一定程度上促进考查类课程的教学改革.

为提升立式辊磨机粉磨性能,在分析得出辊盘配合形式、磨辊个数、转速为粉磨性能主要影响因素后,以颗粒黏结建模思想构建物料模型,将黏结键断裂数作为评价指标,基于离散元软件EDEM进行单因素实验与正交实验.运用MATLAB做回归分析,建立黏结键断裂数与磨辊个数和转速的函数关系模型与响应曲面图,然后将正交试验得出的最优方案代入计算,最后通过仿真验证最优方案的粉磨效率.结果 表明:立式辊磨机的粉磨效率受辊盘配合形式的影响,且随着磨辊数与转速的增大而提升,仿真试验也验证了最佳方案的可行性,为立式辊磨机的设计提供了参考.

以包装全生命周期为主线,提出了一种绿色包装制造技术体系.从绿色设计技术、绿色材料选择技术、绿色生产技术、绿色回收处理技术和绿色制造评估技术五大关键层进行展开,建立一个较为完整的绿色包装制造技术体系.以某豆制品包装设计为例,应用该技术体系设计分析并评估.实例表明,应用该技术体系有助于在全生命周期早期对包装绿色度的判断.

Since the last IAEA Fusion Energy Conference in 2016, the EAST physics experiments have been developed further in support of high-performance steady-state operation for ITER and CFETR. First demonstration of a >100s time scale long-pulse steady-state scenario with a good plasma performance (H-98(y2) similar to 1.1) and a good control of impurity and heat exhaust with the upper tungsten divertor has been achieved on EAST using the pure radio frequency (RF) power heating and current drive. The EAST operational domain has been significantly extended towards a more ITER and CFETR related high beta steady-state regime (beta(p) similar to 2.5 and beta(N) similar to 1.9 of using RF and NB and beta(p) similar to 1.9 and beta(N) similar to 1.5 of using pure RF). A large bootstrap current fraction up to 47% has been achieved with with q(95) similar to 6.0-7.0. The interaction effect between the electron cyclotron resonant heating and two lower hybrid wave systems has been investigated systematically, and applied for the improvement of current drive efficiency and plasma confinement quality in the steady-state scenario development on EAST. Full edgelocalized mode (ELM) suppression using the n = 2 resonant magnetic perturbations has been achieved in ITER-like standard type-I ELMy H-mode plasmas with a range of the edge safety factor of q(95) approximate to 3.2-3.7 on EAST. Reduction of the peak heat flux on the divertor was demonstrated using the active radiation feedback control. An increase in the total heating power and improvement of the plasma confinement are expected using a OD model prediction for a higher bootstrap fraction. Towards a long-pulse, high bootstrap current fraction operation, a new lower ITER-like tungsten divertor with active water-cooling will be installed, together with further increase and improvement of heating and current drive capability.

针对目前对旋轴流风机工作时存在的流场紊乱、涡流噪声、风扇振动现象,对后级叶轮叶片进行穿孔设计,建立叶片穿孔前、后的对旋风机三维模型.在FLUENT软件中利用RNGκ-ε湍流模型和SIMPLE算法对风机内部流场进行数值仿真模拟,分析不同穿孔孔径下,风机叶片表面的压力分布以及涡量分布.