结构

The piston pump has many kinds of structures; the variable displacement axial piston pump with a swash plate is a better kind among them and could best match the requirements of large flow, high pressure, and small volume. It also has a advantage of easily realizing the control of flow and pressure.

柱塞泵有许多结构形式，斜盘式轴向柱塞变量泵是诸多柱塞泵结构中结构比较先进，最能适应现代作业大流量、高压力、体积小要求的柱塞泵结构形式；并且对于实现多种流量、压力控制有着较大的优势。

The closed ring confining truss is set along the periphery of the reticulated shell, and the stiffening truss is set in the middle single-layer shell which can take advantage of the architectural shape. These measures resolve the contradiction between overall stability and temperature stress, and also avoid the shell thrust act on the lower concrete structure directly. Besides, these measures simplify the design of the shell bearing and the concrete structure, and the cost of the concrete structure can also be saved.

网壳通过可径向滑动球铰支座与下部混凝土结构连接，网壳周边设置封闭环形约束桁架，中间单层壳体部分利用建筑凸肋造型设置加劲桁架，解决了保证整体稳定和减小温度应力之间的矛盾，同时避免了网壳侧推力直接传递给下部混凝土结构，简化了网壳支座及下部混凝土结构的设计，节约了混凝土结构的造价。

The vibration properties and random fatigue analysis are valuable for steel structure engineering application. By the analysis results, the engineers can consider in depth in the design phase of the steel-framed structures. Steel structure can be optimized based on the results, so that its antivibration performance and life can be improved.

主要振动响应特性分析结果以及随机疲劳的计算分析对钢架结构的设计具有一定的指导和参考价值，可以使工程设计人员在设计钢架结构阶段考虑得更加深入，使钢架结构得以优化，以期提高钢架结构的抗振性能和使用寿命。

Design on the principle that security , economy are rational , esthetic , fix up the selection of structure and structural level of every floor, assign , turn into with PK software AutoCAD revise the part behind the structural level well; Adopt stair and floor calculating and designing a teacher to appoint by hand, and calculate the appointed floor with PKPM software, compare with the floor that calculates by hand, fetch the drawing construction drawing of the head of the two; Calculate by hand the frame which the teacher appoints loads, set up good PKPM and calculate the procedur

设计以安全、经济合理、美观为原则，进行结构选型和各楼层结构平面布置，用PK软件布置好结构平面后再转到AutoCAD上进行局部修改；采用手工计算设计老师指定的楼梯和楼板，并用PKPM软件计算指定楼板，与手工计算的楼板进行比较，取二者之长绘制成施工图；手工计算老师指定的框架荷载，建立好PKPM计算框架程序模型，用PKPM计算框架内力并输出文件结果，把PKPM计算得到结构配筋图转到AutoCAD进行局部处理；从PKPM得出的框架构件内力组合，选择三组最不利的组合作为基础设计资料，进行手工设计基础，并用AutoCAD绘制得出基础详图及配筋。

Design on the principle that security , economy are rational , esthetic , fix up the selection of structure and structural level of every floor, assign , turn into with PK software AutoCAD revise the part behind the structural level well; Adopt stair and floor calculating and designing a teacher to appoint by hand, and calculate the appointed floor with PKPM software, compare with the floor that calculates by hand, fetch the drawing construction drawing of the head of the two; Calculate by hand the frame which the teacher appoints loads, set up good PKPM and calculate the procedure model of the frame , calculate frame internal force and output file result with PKPM , calculate , get PKPM structure mix muscle picture turn into AutoCAD carry on part punish; Build up pieces of internal force association from frame that PKPM obtain , choose three group unfavorable association design the materials as the foundation most, carry on the design basis of the craft, and draw and obtain the basic detail drawing and match the muscle with AutoCAD.

设计以安全、经济合理、美观为原则，进行结构选型和各楼层结构平面布置，用PK软件布置好结构平面后再转到AutoCAD上进行局部修改；采用手工计算设计老师指定的楼梯和楼板，并用PKPM软件计算指定楼板，与手工计算的楼板进行比较，取二者之长绘制成施工图；手工计算老师指定的框架荷载，建立好PKPM计算框架程序模型，用PKPM计算框架内力并输出文件结果，把PKPM计算得到结构配筋图转到AutoCAD进行局部处理；从PKPM得出的框架构件内力组合，选择三组最不利的组合作为基础设计资料，进行手工设计基础，并用AutoCAD绘制得出基础详图及配筋。

Idlers use stamped bearing house. Using wide clearance bearing and multi-layer labyrinth seal improves service life, reduces rotation resistance and friction coefficient. Cast welding and keyless connection has been used for pulley, Hydraulic coupling and hard surface cone cylinder gear speed reducer for drive unit, angle type structure for head frame, so these improve starting performance, drive efficiency, load capacity and service life, reduce floor area and weight of equipment.

托辊采用了35°槽型前倾结构，辊子为冲压轴承座结构，大游隙轴承和册层迷宫密封，提高了寿命，降低了旋转阻力和摩擦系数，滚筒采用了铸焊结构和无健联接，驱动单元采用了液力耦合器和硬齿面圆锥圆柱齿轮减速机，头架采用角型结构，从而改善了启动性能，传动效率，承载能力和使用寿命，减少了占地面积和设备重量。

Apart from the working limitations resulting from its structural property, the flat plate heat pipe carries out heat dissipation through the evaporation and condensation of the working fluid. Thus, if the working angle of the fluid is adverse to its backflow, the heat pipe will fail easily. Furthermore, not the orientations of all the heat sources are favorable to the functioning of the heat pipe. To compensate for this drawback, this research focuses primarily on the development of a composite structure which will reduce the effect of gravity on the working fluid. Generally speaking, the heat pipe is divided into three main categories: the groove type, sintered metal type and mesh screen type, as shown in Table 2. As far as capillary force is concerned, the sintered metal type and mesh screen type show better performance. As mentioned in R.

平板式热管除了因其结构特性而产生的工作极限之外，由于其作用乃是透过工作流体的蒸发及凝结进行散热，故若是其工作角度不利于液体之回流，便容易使热管失效，且并非所有之发热源都是位于有利于热管工作之位置，因此本研究之主要目的为设计一可减少重力对工作流体影响之复合式结构；一般而言，热管之结构大致可分为沟槽、烧结及网格三种(如表2所示)，其中烧结及网格结构有较佳之毛细力，在 R。

According to the characteristics of large span structure design, such as big diffrence of collumn force, large span and spacious roof, week linkness of different parts and large displacement of bearing, spacil structure methods such as different types of concrete pile with different length, suitable joint and bearing are adopted to achieve the economical and safe demand

提要］针对西北农林科技大学体育馆类大跨度空旷建筑结构的设计特点，如柱底内力差别很大、上部结构空旷、各部分之间的连接较弱、屋盖结构跨度大、支座位移大等，采取差异化的桩型和桩长，适当分缝，合理配置支座等有效的结构措施，达到既安全可靠、又经济性好的目的。

Results revealed that tetraleg-nanorods are multi-crystalline, double-edged nanocombs with twins are bicrystalline, other structures, such as nanorods, namowires, nanobelts, nanoarays , nanomails, single-edged combs and nanosaws, are single wurtzite crystalline.

研究表明四针状纳米棒为多晶结构，孪晶双面纳米梳为双晶结构，纳米棒、纳米线、纳米带、纳米阵列、纳米钉以及多种单面齿状纳米结构均为单晶纤锌矿晶体结构。

But because of its big slenderness ratio, smaller rigidity and damping, it is easy to cause a larger vibration in the windload and iceload function and so on, mast structure destruction accidents frequently occurred, has caused engineering and academic circles\\\s concern, this article summarizes the main structure damage diagnosis methods, carrys on preliminary dynamic analysis and the time-frequency distribution analysis with the vibration signal to the mast structure, and proposes the signal processing method is a appropriate method on the diagnosis to the mast damage.

但是，由于桅杆结构长细比很大，刚度、阻尼较小，在风荷载、裹冰荷载等作用下容易产生较大幅度的振动，桅杆结构的破坏事故时有发生，引起了工程界和学术界的重视，本文总结了几种主要的结构损伤诊断方法，并对桅杆结构进行了动力分析和振动信号时频分析，并提出信号处理的时频方法对桅杆损伤进行诊断比较合适的。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。