查询词典 rotating speed

According to the scheme in chapter 3, experimental investigations are conducted on the single-axis air-bearing test bed. The effects of both rotating speed and air damping on the vibration frequencies of the beam are discussed. The phenomenon of dynamic stiffening is verified by the results of experiment.

最后我们还按照第三章中设计好的实验方案来对非惯性系下的结构动力学问题进行了实验研究，从实验的角度验证了本文一次近似模型在处理这类非惯性系下的结构动力学问题的正确性和有效性，说明了传统零次近似模型对某些高速旋转梁的数值仿真存在严重的偏差。

The mathematical model for rotating speed and hydraulic character of by-pass centrifugal oil filter was deduced.

建立了分流离心式滤清器转速特性和液力特性的数学模型。

And the computation of pseudo-random numbers was programmed by multiplying the congruent number with the APDL language used. Taking account of the effects of original errors resulting from manufacture and the different working conditions such as rotating speed and load on the dynamic property of a bearing, the K-S inspection was done to determine the distribution of the data resulting from the virtual test and, consequently, the reliability was calculated with respect to the fatigue failure of bearings.

在此基础上，运用APDL语言实现乘同余数法产生伪随机数的计算程序，综合考虑轴承原始制造误差以及转速、载荷等不同工况对轴承动态性能的影响，对轴承进行多次随机虚拟试验，运用K-S检验法确定所获得的实验数据分布，求取轴承疲劳失效的可靠度。

The test-bed is designed for 20~40cm diameter wheels, vertical loads in the 0~300N range, drawbar pull forces ranging from 0 to 300N, linear velocity up to 43mm/sec, and wheel rotating speed up to 9.9r/min.

试验台针对的车轮直径范围为20～40cm，可施加垂直载荷0～300N，可测量挂钩牵引力0～300N，台车最大线速度为43mm/s，车轮最高转速为9.9r/min。

Besides,the device can adjust and control rotating speed of electromotor.

此外，还可以根据需要调整控制电机的转速。

Two methods of computing rotating speed were introduced in detail and the speed was calculated with the sampled key phasor pulse.

详细介绍了两种常见的转速计算方法，并对采集的转速键相信号进行了转速计算。

As the complete characteristic curves of reversible pump turbine are often used to calculate the instantaneous parameters, this paper studies the characteristic curve and the wicket closure and opening law in pumped storage plants.Chapter 1 presents the importance and the necessity of this study and reviews the previous related research on hydraulic transient process and valve regulation in pumped storage plants.Chapter 2 analyzes the six collected characteristic curves of reversible pumped turbine and studies their diversification from the point of view of specific speed. The six collected discharge and moment curves with maximum efficiency have been fitted to piecewise continuous curves. This curve-fitting procedure is listed.Chapter 3 takes Liyang Pumped storage plant as an example and analyzes the effect of different characteristic curves on regulation guarantee parameters and the variety of its trochoid during the same operation status.Chapter 4 takes three pumped storage plants with different heads as examples and studies the characteristic of coordinated closure with wicket gate and ball valve and its effect on dynamic pressure in the spiral case, inlet pressure in the draft tube and the rise of rotating speed.Chapter 5 summarizes this paper and point out what should be done in the future research.

由于在过渡过程分析计算中，需要频繁利用可逆式机组的全特性曲线推求机组的瞬时参数，所以本文就特性曲线及关闭规律问题进行了研究，其主要内容如下：第1章，指出本文研究的意义和目的，回顾前人对水力过渡过程、抽水蓄能电站及阀调节的研究成果，在此基础上提出本文的研究内容；第2章，针对收集到的六套特性曲线，从比转速的角度出发来研究可逆式机组特性曲线的变化规律；并对六套曲线的最高效率流量和力矩曲线进行分段拟合，得到各分段函数的具体形式，再通过举例说明最高效率曲线的拟合步骤；第3章，以溧阳抽水蓄能电站为实例，分析讨论不同比转速特性曲线对调保参数造成的影响及对于相同工况其轨迹线的变化；第4章，结合高、中、低三水头段抽水蓄能电站，在导叶直线关闭的基础上，研究导叶与球阀协联关闭规律的特点及对蜗壳动水压力、尾水管进口压力及转速上升造成的影响；第5章，总结全文，提出今后研究的重点和方向。

Based on the analysis of one type high-speed gas bearing working principle, the bearing diameter of axle static carrying force model was set up, and the relationship between bearing clearance gas flow rate, intensity of pressure and orifice radius were analyzed, along with the diameter of axle movement tracking under the centrifugal force in the low rotating speed was found.

在分析一类高速气浮轴承工作原理的基础上，建立其轴径轴承的静态承载力模型，并据此分析出轴承间隙中气体流量、压强与节流孔孔径间的相互关系，以及在低速运转下受离心力作用的轴径中心运动轨迹。

There are six technical characteristics in the system. lUsing the way alike differential input to increase the ability of anti-jamming. 2Combining multiple thread with DMA to ensure real time online monitor. 3Realizing high precision measurement of rotating speed by general purpose counter and timing in A/D card.4Using TCP/IP network protocol to realize high speed data transport between upper computer and lower computer.

该监测诊断系统具有六大主要技术特点： 1、利用准差动输入，提高现场抗干扰能力； 2、将基于Windows平台的多线程技术与DMA技术结合，保障在线系统采样的实时性与多任务性； 3、采用A/D卡自带定时/计数器对机组转速进行高精度测量，实现加窗转速跟踪快速分析； 4、利用TCP/IP协议实现上下位机网络数据高速传输； 5、采用传统振动测试与RS—485总线结合对多种测试信号进行混合采集。

It features big needle stitch, thick sewing material, high rotating speed, pressure-foot revival dual feed, bisynchronous feed for up feed, needle stem thread picking, bend needle drawing, eccentric positioning of principal axis, mechanical full-automatic lubrication to increase speed, ensuring the quality and prolonging the lifetime, making the material neat and regular with good-looking thread stitch and even needle pitch.

其特点：针距大，缝料厚，转数高，采用单压脚上下复活式双送料，双同步，上送料为双牙齿送料，针杆挑线，弯针勾线，主轴偏心定位，机械式全自动供油全润滑，提高速度，保证整机质量，延长使用寿命，使制品整齐，针距均匀，线迹美观牢固。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。