挠度

According to the model, the deflection and main pre-brace parameters are illustrated with the Jinsong station of the tenth line in Beijing. It demonstrates that the curve shape of theoretical result, computing result and the on-set measure result are uniform in the main and the change law is similar; that the circumferential space of pipe-roof has a optimum value while satisfying the pre-brace function; that the relation between diameter of steel pipe and flexibility of barrel vault meets negative exponential function. And the diameter of steel pipe has a optimum value.

依据该模型，以北京地铁10号线劲松车站管棚支护为例，着重对管棚的挠度和主要支护参数进行的分析表明：理论结果与计算结果和现场量测结果的曲线形状基本相同，变化规律相似；在满足预支护作用的同时，存在相对较优的管棚环向间距；钢管直径与管棚挠度之间符合负指数函数关系，管径存在最佳值。

The paper give the right reply through the research of influence of internal force that deflection of shoulder beam cause.

在研究挑梁挠度对结构内力的影响这一规律之前，本文就悬臂梁的挠度计算方法做了一定的研究。

The shape of a virtual tail beam is given by the deflection curve of a fixed-ends beam .

它假定每个车辆有一虚拟的尾梁，而虚拟尾梁的形状用固支梁挠度曲线来表示，进而得到了一种推广了的固支梁挠度曲线模型。

Finally, monitoring results of the project of S249 Bridge across Beijing-hangzhou Grand Cannel are introduced, the real deflection, displacement and stress of segments are accordance with computing.

更多杭运河特大桥施工监控的结果，较详细地比较了梁体阶段挠度、累计挠度、测点应力的计算值和实测值的关系。

According to that characteristic and based on the differential equation of the deformed surface of the orthotropic plate, with one principal direction size fixed, changing another principal direction size linearly, maintaining elasticity coefficient the same as in the first principal direction and Poisson ratio equal to the geometric mean of two principal Poisson ratios, the original orthogonal plate is equivalent to an isotropic plate. Results obtained show that the deflections of the equivalent isotropic plate are the same as the deflections of the original orthotropic plate at the corresponding points, the forces of the correspondent points have simple relations.

根据这一特性、从正交各向异性板挠曲面的偏微分方程出发，保持一个主方向尺寸不变，另一主方向的尺寸做线性缩放，保持弹性模量与第一主方向相同，泊松比取2个主方向泊松比的几何平均值，将这类正交各向异性板等效为一块各向同性板；通过分析得到：各向同性板任意点的挠度就是原正交各向异性板对应点的挠度，各对应点内力之间存在简单的比例关系，该文的方法将为工程技术人员提供方便，同时可以更加直观的认识正交各向异性板的受力。

For a flat plate the maximum deflection shall be limited to one half of the plate thickness and 1/400 of the unsupported length for a beam.

对于扁板的最大挠度应限制在板厚的一半，对于梁的最大挠度应限制在未支撑长度的1/400。

The postbuckling behavior of a long rectangular plate with initial deflection under uniaxial compression is discussed based on the large deflection theory of thin plates.

本文应用薄板大挠度理论，对有初挠度的长矩形板在纵向压力作用下的屈曲后行为进行近似分析，推导出计算板的极限强度和有效宽度的理论公式。

The result shows that, compared with the plate with uniform thickness under the same condition, the maximum deflection of the simply supported square plate decreases by 44.66%, and the maximum deflection of the fixed square plate decreases by 75.63%.

结果表明，与同条件下的均厚度板相比，受均布横向荷载作用的四边简支方板最大挠度值降低了44.66%，四边固支方板最大挠度值降低了75.63%。

The conclusions provides practical significance for engineering practice.The side displacement of the glass plate center is larger or less than the glass plate thickness,for the 3D geometric size of the glass plate and the lateral load vary in a wide range. In other words,the mechanic analysis of glass plate belongs to large deflection or small deflection theory in thin plate theory.

由于幕墙玻璃的三向几何尺寸和横向荷载集度可在较大的范围内变动，玻璃板中心的侧向位移，有可能小于或大于玻璃板的厚度，也就是说，幕墙玻璃的力学分析，既可能属于薄板理论中的小挠度问题，也可能属于大挠度问题。

When inertia force ofa transmission shaftdoesnotchange, itsmaximum transversaldisplacement is equal to the sum of the static deflection produced by inertia force and gravity and the amplitude ofdeflection induced by eccentric mass, and when inertia force of a transmission shaft changes, dynamic deflection is produced.

惯性力不变时，传动轴的最大横向位移等于惯性力和重力产生的静挠度与质量偏心产生的动挠度幅值之和；惯性力变化时，传动轴产生动挠度。

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。