矿山井下电机车运输信号系统工程研究开发

矿山并下运输在我国大多数为有轨运输，对安全生产起着重要的作用。多年来因技术、管理等方面的原因，成功经验不多。直至近几年随着经济、技术的飞速发展，井下矿生产逐步在实现现代化，但突出暴露了运输环节安全保障的落后状态。特别是煤矿安全生产尤为重要。成为井下矿安全生产的薄弱环节。“井下电机车运输信号系统工程研究开发”是一套井下轨道运输“信”“集”“闭”（矿井运输信号集中、闭塞的简称）系统。该矿井下煤炭运输全部依靠6m2底卸式矿车，有三个卸煤坑和三种卸煤方式。还需考虑三个卸煤坑同时又能交叉使用的所有进路，使系…     

考虑运输成本的JIT采购模型及算法

以供应商和采购商组成的供应链为研究对象，建立了考虑运输成本的JIT采购批量分割决策模型。针对运输成本是运输重量不规则函数的事实，应用费率模拟函数估算运输成本，分别导出了面向整车运输和零担运输的决策模型；基于两个模型解的最优订货批量相等，且整车运输模型解交付次数低、库存成本高，而零担运输模型解交付次数高、运输成本高，提出JIT-Lot-Sp-Opt算法，搜索得到最优交付次数，对JIT采购进行优化决策。实验结果证明，模型和算法在不损失精确性和优化性的前提下求解简单，具有实用性。     

基于重用的中小型企业农业运输机械快速设计平台的开发与研究

对于中小型企业而言，农业运输机械快速设计平台的开发在一定程度上关系着企业核心竞争力的提高。因此，本文主要从体系结构和关键技术两个方面探讨了农业运输机械快速设计平台的开发，以期为中小型企业的长远发展提供一些帮助。     

精密仪器制造后的相关测试研究

对某精密仪器OPC在运输中的振动问题进行了研究，分析了不同路面、不同车速条件下运输OPC的随机振动响应，对OPC进行了随机振动试验。提出了OPC在进行宽带随机振动实验中必须面临的几个技术问题及处理方法，保证了OPC在运输中的安全性。实验测量了多点的加速度信号，并用信号分析仪进行了数据处理，获得了该机振动的参数，为OPC的防振、抑振提供了参考。     

起重运输机械驾驶室前围角度的计算

运用几何中向量的概念，推导出3个平面两两相交时，其二面角与平面角的关系，得出8个计算公式，可解决起重运输机械驾驶室的有关角度和展开尺寸的计算。     

电梯控制策略探究

为了使人们乘坐电梯的时间缩短，安装多台电梯以满足大楼里的运输是很有必要的，这时就需要将对台电梯进行分组，依照建筑物内客流量的变化，选用最优的运输方式，对电梯进行合理调配，使其达到最佳的效率。本文从硬件和软件、群控算三个方面分别阐述了电梯控制系统的设计要点。     

关于倾斜巷道运输事故的成因及防范策略

目前，我国煤矿所发生的事故中，矿井运输事故占据了总事故的20％左右，而矿井运输事故中，当属倾斜巷道运输事故的发生率最高。为此，加强煤矿倾斜巷道运输安全事故的原因分析，提高事故防范水平，对于确保煤矿的安全生产而言意义重大。煤矿倾斜巷道运输安全事故包括许多类型，且不同的类型，成因及防范策略也各不相同，本文——进行了分析和探讨，以供相关人员参考。     

高应力大倾角切眼综掘施工工艺优化

针对综掘机在切眼施工期间受巷道倾角大导致综掘机掘进期间不稳定、运输难度大等问题，对掘进工艺、运输方式等进行优化。现场应用后，山西某矿31302工作面切眼耗时1个月即可完成掘进，期间综掘机及运输设备等始终保持稳定，实现了高应力大倾角切眼的快速安全掘进。     

摆臂式自装卸物料运输车的结构与原理

近年来，随着我国城镇居民生活水平不断提高，各种散装物料的运输量加大。尽管城镇道路建设有了长足发展，但由于汽车数量同步增加，交通拥挤、道路堵塞现象没有明显改善。传统的散装物料的运输大多采用自卸车来完成，其缺点是：（1）只能卸料而不能装料；（2）车斗与车底盘不能分离，1个车斗必须设有1个底盘。但社会对专用车性能用途的要求越来越高，市场需要的交通工具将是更经济、更环保的产品。     

基于响应面法的核部件运输桶结构冲击可靠性分析

根据专用的水力部件应用环境要求，设计一款用于核部件运输的专用容器。利用ANSYS中的LS-dyna模块对运输桶进行高度为0.3 m的垂直掉落和倾斜掉落冲击研究，得出其在2种冲击工况下的应力分布情况，并以3个壁厚和掉落高度4个输入变量进行可靠性分析；利用二次多项式对4个输入变量和对应的应力点进行拟合，求解参数变量，构建响应面模型；结合6 Sigama模块对整体结构进行可靠性分析，算出该模型的整体冲击最大应力，并得出该模型在倾斜冲击情况下的可靠性为95.233%。     

CURING PROCESS OF PHOTOPOLYMER RESIN BOND DIAMOND TOOLS

Analytical simulation and corresponding proof-test are adopted to study the principle of the curing process of photopolymer resin diamond tools. The influence of the diamond as abrasives in photopolymer resin owing to the absorptivity of the diamond for the UV light on the photopolymer resin curing process is discussed. Based on the above, a kind of diamond tool—dicing blade is selected to analyze the curing process of photopolymer bond diamond tools. An analytical model of curing process is developed and a correlation curve between the depth of polymerization of the photopolymer resin diamond tools and the exposure time to represent the curing process of photopolymer bond dicing blade. A test is done to proof-test the validity of the analytical model and the correlation curve. The simulated data fit the experimental results, which demonstrates the analytical models and numerical algorithm are of high reliability. The analytical simulation method could possibly be used to optimize the curing cycle and improve the quality of the photopolymers resin bond diamond tools.     

Effects of prebuckling deformations on the elastic flexural-torsional buckling of laterally fixed arches

The effect of the prebuckling in-plane deformations on the elastic flexural-torsional buckling of laterally fixed circular arches is studied in this paper. The finite strains and the energy equation for the flexural-torsional buckling of arches have been derived based on an accurate orthogonal rotation matrix. A closed form solution for the elastic flexural-torsional buckling resistance of laterally fixed arches in uniform bending, including the effects of the prebuckling deformations, is obtained. It is found that the notion that the prebuckling deformations increase the flexural-torsional buckling moment of an arch or of a beam is not necessarily correct for a laterally fixed arch or beam in uniform bending, in deference to a laterally pinned arch. When a laterally fixed arch is subjected to positive uniform bending, the effects of the prebuckling deformations decrease the buckling moment, and the reduction of the buckling moment increases with an increase of the included angle and of the out-of-plane slenderness ratio of the arch. When a laterally fixed arch is subjected to negative uniform bending, the effects of the prebuckling deformations decrease the absolute value of its buckling moment when the included angle is very small, but increase the absolute value of the buckling moment when the included angle exceeds a certain value. The increase in the absolute value of the buckling moment increases with an increase of the included angle and of the out-of-plane slenderness ratio of the arch. When the ratio of the out-of-plane to the in-plane second moments of area of the cross-section is not small, both the reduction of the buckling moment of a laterally fixed arch in positive uniform bending and the increase of the buckling moment of a laterally fixed arch in negative uniform bending, are substantial.     

Research on key techniques of expendable conductivity temperature depth measuring system

This paper analysis the developing of expendable conductivity temperature depth measuring system(XCTD)and introduce its principle of measuring about temperature,salinity and depth of ocean.Some key techniques are put forward.According to the real needs of XCTD,conductivity sensor with high sensitivity is designed by principle of electromagnetic induce,the ocean conductivity from induced electromotive force has been calculated.Adding temperature correction circuit would help to reduce error of conductivity measurement because of sharply changing temperature.Advanced temperature measuring circuit of high precision and the constant current source is used to weaken effect of self-heating of resistance and fluctuation of the source.On respect of remote data transmission,LVDS is a good choice for the purpose of guarantee the quality of data transmitted and the transmission distance is reaching to thousand meters in the seawater.Modular programming method is also brought into this research aimed at improve the stability,reliability and maintainability of the whole measuring system.In February,2015,the trials in South China Sea demonstrate that the developed XCTD realize effective measurement at a speed of 6 knots and detection depth at 800 m.The consistency coefficient of the acquired data is greater than 0.99 and the success rate of probe launching is above 90%.     

CHARACTERISTCS OF FLUID FILM IN OPTIMIZED SPIRAL GROOVE MECHANICAL SEAL

In order to investigate the sealing performance variation resulted from the thermal deformation of the end faces, the equations to calculate the fluid film pressure distribution, the bearing force and the leakage rate are derived, for the fluid film both in parallel gap and in wedgy gap. The geometrical parameters of the sealing members are optimized by means of heat transfer analysis and complex method. The analysis results indicate that the shallow spiral grooves can generate hydrodynamic pressure while the rotating ring rotates and the bearing force of the fluid film in spiral groove end faces is much larger than that in the flat end faces. The deformation increases the bearing force of the fluid film in flat end faces, but it decreases the hydrodynamic pressure of the fluid film in spiral groove end faces. The gap dimensions which determine the characteristics of the fluid film is obtained by coupling analysis of the frictional heat and the thermal deformation in consideration of the equilibrium condition of the bearing force and the closing force. For different gap dimensions, the relationship between the closing force and the leakage rate is also investigated, based on which the leakage rate can be controlled by adjusting the closing force.     

滚筒采煤机负载的波动性分析

为了寻求滚筒采煤机正常工作时自身产生振动与冲击的原因,经过对滚筒上截齿受到的截割阻力与牵引阻力以及该两力在采煤机的牵引方向和竖直方向分力进行分析,得知两分力大小与截齿的切削厚度和旋转角度位置有关;研究了滚筒上受到的瞬时力与平均力的计算方法,推导了综合旋转角度和切削厚度的载荷波动系数的计算公式,并对所建立的公式进行了仿真模拟。结果表明:截齿数目从偶数增加1变为奇数时,载荷的波动系数的值明显减小;截齿从奇数增加1变为偶数时,载荷的波动系数不一定减小;适量的增加滚筒上同一螺旋线上截齿的数目可以有效的减小载荷的波动系数;为了提高截齿的使用寿命和可靠性以及滚筒的稳定性,减小滚筒和整个采煤机的冲击性,同一螺旋线上一周内截齿的数目应该尽量选用奇数。     

INFLUENCE OF ROLL DIAMETERS ON DEFORMATION BEHAVIOUR OF HIGH TEMPERATURE SUPERCONDUCTING TAPE

During plastic process,the material flow is strongly influenced by the contact area between deformed workpiece and die.In rolling process,difference of roll diameter makes the contact area between roll and deformed tape different,which leads to different material flow and the distribution of powder density.A numerical modelling of the first rolling process for 61-filament high temperature superconducting tape is constructed and the influences of roll diameters on deformation behavior of the tape are discussed.It can be found that the BiSrCaCuO(BSCCO)powder in the center of the tape has higher relative density than those in the periphery of the tape during rolling process.With the increase of roll diameter,the length of the contact arc in the roll gap expands which lead to the in- creasing of transversal strain and the decreasing of the related longitudinal strain.It makes the value of longitudinal strain ratio decrease gradually,which decreases the possibility of occurrence of the transversal shear band,simultaneously it increases the risk of occurrence of longitudinal crack.     

DIAGNOSTICS OF FATIGUE CRACK IN ULTERIOR PLACES OF LARGER-SCALE OVERLOADED SUPPORTING SHAFT BASED ON TIME SERIES AND NEURAL NETWORKS

To improve the diagnosis accuracy and self-adaptability of fatigue crack in ulterior place of the supporting shaft, time series and neural network are attempted to be applied in research on diag-nosing the fatigue crack’s degree based on analyzing the vibration characteristics of the supporting shaft. By analyzing the characteristic parameter which is easy to be detected from the supporting shaft’s exterior, the time series model parameter which is hypersensitive to the situation of fatigue crack in ulterior place of the supporting shaft is the target input of neural network, and the fatigue crack’s degree value of supporting shaft is the output. The BP network model can be built and net-work can be trained after the structural parameters of network are selected. Furthermore, choosing the other two different group data can test the network. The test result will verify the validity of the BP network model. The result of experiment shows that the method of time series and neural network are effective to diagnose the occurrence and the development of the fatigue crack’s degree in ulterior place of the supporting shaft.     

浅议机械论世界观主导地位之确立

占现代人类主导思想地位的机械论世界观,它的统治地位的确立是一个循序渐进的过程,先后经历了机械论大门的开启者培根,机械论世界观的架构者笛卡尔,机械论世界观主导地位确立和宣扬者牛顿,以及机械论世界观的社会意识形态补充者洛克,机械论世界观的经济意识形态的确立者斯密,再加上机械论世界观进步思想的巩固者达尔文等在各自不同领域的不懈探索和大力倡导,再加上其它意识形态领域潜移默化地影响而逐步得以确立。     

ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.     

EFFECTS OF LEAD WIDTHS AND PITCHES ON RELIABILITY OF QUAD FLAT PACKAGE （QFP）SOLDERED JOINTS

The finite element method(FEM)is used to analyze the effects of lead widths and pitches on reliability of soldered joints.The optimum simulation for QFP devices is also researched.The results indicate that when the lead pitches are the same,the maximum equivalent stress of the soldered joints increases with the increasing of lead widths,while the reliability of the soldered joints reduces. When the lead widths are the same,the maximum equivalent stress of the soldered joints doesn't decrease completely with the increasing of lead pitches,a minimum value of the maximum equivalent stress values exists in all the curves.Under this condition the maximum equivalent stress of the sol- dered joints is relatively the least,the reliability of soldered joints is high and the assembly is excel- lent.The simulating results indicate the best parameter:The lead width is 0.2 mm and lead pitch is 0.3 mm(the distance between two leads is 0.1 mm),which are benefited for the micromation of QFP devices now.The minimum value of the maximum equivalent stress of soldered joints exists while lead width is 0.25 mm and lead pitch is 0.35 mm(the distance between two leads is 0.1mm),the devices can serve for a long time and the reliability is the highest,the assembly is excellent.The simulating results also indicate the fact that the lead width is 0.15 mm and lead pitch is 0.2 mm maybe the limit of QFP,which is significant for the high lead count and micromation of assembly.