cut

The Riemannian metric of perspective in stereo graphic projection is introduced and a property of the continual cut vector field on the spherical surface is discussed.

介绍了在球极投影下引入的黎曼度量,并介绍了这种度量的一些性质,指出了这种度量与从平直的欧几里德空间标准度量中诱导的黎曼度量是一致的;同时指出在球面上的连续切向量场上必然有奇点存在,这就为球面的量测作了理论上的准备;最后介绍了球极投影下的联络系数及其计算公式。

Put forword the determine a method on the direction of the tangent and the radius of the curvature.

指出了在自然坐标系中应用动力学方程解题的问题所在,提出了自然坐标系中切向及曲率半径的确定方法,并通过例题,说明理论的应用。

Study on single tangent ring bar sprayed bubbling gas distributing desulphurization device;

单切向环栅式喷射鼓泡进气脱硫装置的研究

Based on the Inglis formula, which calculates the tangential stress of the surrounding rock of geological stress field in different circumstances, programme is developed to compute the corresponding tangential stress of the surrounding rock of several underground plants, for instance, Ertan project of Sichuan according to different directions of longitudinal axle.

从地下洞室周边切向应力的英格里(Inglis)公式出发,提出针对不同环境的地应力场进行地下厂房纵轴线方位优选的简便方法,并编程计算了四川二滩等多个地下厂房不同纵轴线方向所对应的洞室周边切向应力,分析不同纵轴线方向条件下洞室周边切向应力的极值,并与实际工程所选取的纵轴线方向所对应的切向应力值比较,讨论了工程所选纵轴线的合理性以及洞室周边应力的集中程度。

The compulation formulas on radial stress,tangential stress and deflection were derived.

运用平板理论 ,分析了周边固定受同心环形线载荷作用环形圆板的应力 ,并且导出径向应力、切向应力及挠度的计算公式 ,为结构设计提供了方

The calculation formulae of normal stress difference,tangential stress and moment acted on the inner cylinder for the flow of power-law fluid in annulus with the inner cylinder executing a planetary motion under motive bipolar coordinate system were given.

给出了运动双极坐标系下幂律流体在内管做行星运动的环空中流动时流体作用在内管外壁上的法向应力差、切向应力和扭矩的计算公式;以可视为幂律流体的CMC水溶液为例,利用幂律流体在内管做行星运动的环空中流动的流函数分布的数值解对该流动时流体作用在内管壁的法向应力差、切向应力和扭矩进行了数值计算,并分析了内管自转和公转速度、环空偏心度以及压力梯度对其的影响;还以水为例,把利用数值解绘制的法向应力差、切向应力和扭矩的分布曲线与解析解绘制的法向应力差、切向应力和转矩的分布曲线进行了对比,两者吻合较好,说明给出的幂律流体在内管做行星运动的环空中流动时流体作用在内管外壁上的法向应力差、切向应力和扭矩的计算公式以及数值计算方法是正确的。

Effect of circle tangential influx on membrane distillation flux;

旋转切向入流对膜蒸馏通量的影响

The approximate formula of the changing value of wall thickness of the inner and outer side of the tube and the formula of the tangential strain are presented,which may be applied to practical production after amending.

通过大量管材弯曲试验,分析了沿弯曲线的切向和管壁厚方向的应力应变状态,给出弯管内、外侧管壁厚变化量和切向应变的近似计算公式。

It was found that during the no_mandrel bending forming process of minor diameter tube,the actual tangential strain along pipeline direction was approximately distributed in parabola,and the maximum strain appeared around the intermediate section of the bending angle.

作为管材弯曲变形机理实验研究的一部分,通过大量实验结果证明了小直径管无芯弯曲成形过程中,沿管线方向的真实切向应变近似呈抛物线形分布,最大应变产生在弯曲角中部附近。