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The structure parameter influences on lateral stability, such as arch axis coefficient, arch high span ratio, crankle rigidity ratio of arch rib, vertical and lateral rigidity ratio of arch rib, lateral rigidity of bridge decking and arch rib ratio, crossbeam number, rigidity of crossbeam number the effect of non-orientedly conservative loadings of bridge deck and width span ratio, were discussed. Corresponding numerical charts were given, and they may be of some reference value and helpful to the parameter design of ribbed arches.

考虑了拱轴系数、矢跨比、拱肋抗扭刚度与横向抗弯刚度比、拱肋的竖向抗弯刚度与横向抗弯刚度比、横系梁在拱肋切平面内的抗弯刚度和拱肋的横向抗弯刚度比、横系梁在拱肋径向的抗弯刚度与拱肋的横向抗弯刚度比、桥面系的横向抗弯刚度与拱肋的横向抗弯刚度比、横系梁的数量、桥面系横向刚度引起的非保向力效应及拱肋间距与跨径的比对组拼拱横向稳定的影响,并给出了相应的图表,为拱桥设计时拱肋的结构参数的选取提供一定的依据。

At first, an ordinary gear train composed of two gear pairs is analyzed. The constituting principle and the equivalent gear pair of a ordinary noncircular gear train are studied under two assembling circumstances, including phase angle exists between two gear pairs or not.

以分析两对齿轮副构成的定轴轮系为非圆齿轮机构分析的起始点,本文首先分析了两对齿轮之间有相位角与无相位角两种安装情况下,定轴轮系的构成原理与轮系等价齿轮副的传动关系。

It is revealed that the asymmetric vortices over slender body are formed the breakaways of higher position vortex and generation of new vortex, which are alternately developed on the both sides along the body axis. The correlation between asymmetric vortices structure and distribution of sectional sideforce coefficient has been obtained. A physical model of asymmetric multi-vortices flow structure is developed according to zonal flow analysis.

在此基础上揭示了非对称涡系是通过细长体两侧背涡沿轴向交替脱落、新生而形成的,给出了非对称涡系沿轴向演化、发展的流动结构和截面侧向力分布特性之间的相关关系,在分区分析的基础上提出了非对称涡系结构的物理模型。

This article summarizes worldwide application and development of compound material in naval ship s,including application in the machinery and other equipment,superstructure,deck,bulkhead,advanced mast system,propeller,thrust shafting,rudder,pipeline,pump and valve for large naval ship s including frigate,destroyer an.

该文综述了近年来复合材料在海军舰艇上的国外应用现状及进展,包括在大型军舰如护卫舰、驱逐舰和航空母舰上的机械及其他装备,以及上层建筑、甲板、舰舱壁、先进的桅杆系统、螺旋桨、推进轴系、方向舵、管道、泵、阀等上的应用。

REMOVE STERN TUBE TO THE PLACE SHOWN ON "SHAFT ARRANGEMENT" BY FWD AND AFT CHAIN BLOCKS.

利用艏艉手拉葫芦的配合将艉管移到&轴系布臵图&中所示的位臵。

REMOVE STERN TUBE TO THE PLACE SHOWN ON "SHAFT ARRANGEMENT" BY FWD AND AFT CHAIN BLOCKS.

I。 利用艏艉手拉葫芦的配合将艉管移到&轴系布置图&中所示的位置。

On a grating type gear integrated error measuring equipm ent, this technique employs the three-point method error separation technique fo r separation of the systematic error of the measuring chain of equipment spindle system including measuring worm error, grating transducer error, bearing rota ry error etc.

在一台光栅式齿轮整体误差测量仪上,它用三点法误差分离技术能分离开仪器轴系测量链的系统误差(包括测量蜗杆误差、光栅传感器误差、轴承回转误差等)和被测齿轮的全谐波误差。

The conventional onesided travelling-wave ultrasonic motor needs bearing to support and oil to lubricate, does provide sufficiently high torque and power due to limited contact area between the stator and the rotor, consequently its application is limited.

针对传统的行波超声电机定转子接触面小、输出力矩小,需要轴承定位,存在润滑问题,设计了一种新型双锥面齿驱动的自支撑轴系行波超声电机。

The helical gear transmission system which is one important component of marine shafting has been widely applied in marine power plant.

斜齿轮传动系统广泛应用于船舶动力装置中,是船舶轴系后传动部件之一。

By each gear wheel system is a fixed geometric axis is divided into a fixed axis and the epicyclic gear train, epicyclic gear train again planetary gear train and differential gear train.

按轮系中各齿轮的几何轴线是否固定分为定轴轮系和周转轮系,周转轮系又有行星轮系和差动轮系。

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