主要部件

This paper, which focused on the structure optimization theory and method, has finished such studies as follows: The three dimension model has been built, which provide the necessary conditions for the building of the dynamics equivalent model. By the launch dynamics simulation, the loads of the key joints when the rocket is launched has been got, which provide the necessary data for the finite element analysis and the structure optimization. The finite element model of the excess weight parts of the rocket has been built, buy the finite element intension analysis of the model in two conditions, the displacement and the stress of the key points have been got, which make us know the distributing of the stress and the transmogrification of the part. To satisfy the intension and the precision design request and to decrease the weight of the part as many as possible, the part has been topology optimized by the structure optimization theory and method. After that, the new model has been analysis in structure and launch dynamics. The contrast of the character change of the old part and the new part and the influence on the rocket system have been studied.

本文以结构优化理论和方法为核心，主要做了以下工作：建立了某自行火箭炮全炮三维实体模型，为建立该火箭炮系统的动力学等效模型提供了必要条件，进行了发射动力学仿真，得到该火箭炮发射装置各关键连接部位在发射状态下的载荷，为有限元分析和结构优化提供了必需的数据；建立了该火箭炮发射装置超重部分的有限元模型，分两种工况，对模型进行了有限元强度分析，得出了关键部位的位移和应力值，对其的应力和变形分布有了具体的了解；运用结构优化的理论和方法，对该火箭炮发射装置超重部分进行了拓扑优化，使其在满足强度和精度的要求下尽可能多地减轻重量，对优化后得到的模型进行了结构分析和发射动力学分析，对比了该部件优化前后的特性变化以及对火箭炮系统的影响。

Small deep groove ball bearings produced in this company are mainly serving electric motors segments for houses appliance and two-wheeler.

公司目前有员工200多名，主要产品是深沟小球轴承，服务于家用电器和两轮车辆的电机部件行业。

It is applied to sorts of locomotive engine , In course of revolving of Crank and Connecting Rod Mechanism, there are revolving of the crankshaft , swinging of the connecting rod and reciprocating motion, so its motion state is complex, and periodic unbalanced force, by a few components, is great.

曲柄连杆机构在高速运转过程中，有曲轴的转动、连杆的摆动及活塞的往复运动，其运动状态复杂，各个部件所产生的周期性不平衡惯性力大，是引起发动机振动的主要原因。

Slipper type universal coupling"s fork joint and palm end are the weak parts of the main transmission system. In this article, the two parts" intensity values are obtained through finite element analysis . After making three-dimensional computer simulation analysis by ANSYS, the results show that the middle arc of the fork joint in loaded side and the intersection of fork bore and the arc are the danger location, where the stress is largest and stress concentration is serious.

本文对轧机主传动系统机械部分的薄弱部件进行强度计算，即对滑块式万向联轴器的主要零部件的强度进行有限元分析，通过ANSYS有限元分析软件进行三维计算机仿真，由计算结果可知，在叉头受载侧过渡圆弧段中部、叉头镗孔与过渡圆弧交接处这两个部位的应力最大且存在严重的应力集中，考虑到单元总数限制及计算时间等因素，整体模型的网格划分较疏，不能反映倒圆角等细节。

It has the same style with LTHS100E, however, its functions were improved based on the old style; at present, LTHS100B applies imported wind pump assembly which has twice theme ---absorb and blow (increase parts on positive pressure air, strengthen the pressure that can deliver the unmelted flux directly into little hopper); the height of material absorbing and delivering can reach as high as 5 meters, and its level distance is around 12 meters, and the capacity of flux depends is 80KG; the suspended function also can be tailored according to customers' requirements; the weight of 100B is 130KG, its outer dimension is 450*800*1100mm. It has the advantages of small-volume, light-weight, beautiful-outer-appearance, unnecessary of air-compression, and can be ground-mounted or suspended; it is also easy to be operated, with switching on button, it can be operated. Furthermore, it is controlled by infrared ray. It has alarming lights.

该机与LTHS100E机形相同，但其主要特点：在LTHS100E的基础上精心整改了其功能，现LTHS100B是采用进口风泵总成为基础，吸、吹二次全部为主题（在正压气上增加了部件，增强了压力把吸收回来没有融化的焊剂直接推送到前方机头的小料斗内，）焊剂的吸、送料其高度不得超过5米，水平距离在12米左右，焊剂容量为80KG，可悬挂也可根据用户需要为用户量身订制，自重为120KG，外型尺寸为：450*800*1100mm，本机具有体积小，重量轻，外型美观，不需要具备压缩空气，可落地、可悬挂灵活，其操作简便为一线通即可，红外线控制，上方有警示灯显示，当焊剂不足时就会报警。

In this paper, a new fault-tolerant routing algorithm is presented and is applied in Mesh networks employing wormhole switching.

1引言耐故障是并行计算机互连网络设计中面临的主要问题之一，耐故障指网络在部分部件失效的情况下正常运作的能力。

Crank bearing is the key component of crank connecting rod mechanism of emulsion pump and the damageable part during power transmission.

曲柄轴承作为乳化液泵曲柄连杆机构的关键部件，也是动力传递过程中极易损坏的薄弱环节，曲柄轴承的磨损失效是高压大流量乳化液泵的主要失效形式。

Ogrammable logic controller meets the specifications to guarantee the safe operation of equipments.Crank bearing is the key component of crank connecting rod mechanism of emulsion pump and the damageable part during power transmission.

曲柄轴承作为乳化液泵曲柄连杆机构的关键部件，也是动力传递过程中极易损坏的薄弱环节，曲柄轴承的磨损失效是高压大流量乳化液泵的主要失效形式。

The main elevator parts which we can provide are below: Controller ,Gearless machine ,LED ceiling ,interphone COP ;and the designing and manufacturing for some special cabin.

我公司提供的主要电梯部件有：控制柜、主机、LED吊顶、对讲机、操作面板及特殊的轿厢的设计和制造。

As the main work and energy consuming device of small and medium sized air-conditioning units, scroll compressors have much inapproachable advantages over any other kinds of compressors, such as low level of vibration and noise, light weight, high efficiency, high reliability, low energy consuming.

涡旋压缩机作为中小单元制冷空调系统的主要工作与耗能装置，具有比其他各种形式的压缩机无可比拟的优越性，如运动部件少、结构紧凑、低噪音、低振动、高效率、高可靠性和低能耗等。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。