向轴的

The numerical results were proved to be reliable by comparing with some published experimental data. The results show that, when only Coriolis force is in effect by omitting the centrifugal buoyancy force, the flow in the cavity is axi-symmetrically stable, the Coriolis force is a kind of resilience, and does not cause flow unstably.

研究结果表明：在哥氏力的单独作用下轴向通流旋转盘腔内的流动基本上是稳定的三维轴对称结构，即使有轻微的径向或周向振动发生，由于哥氏力是恢复力，对其有抑制作用，因此振动会随着流场的发展逐渐消失。

Comparison between the velocity distributions at the different flow rate conditions showed that increasing the flow rate was help to improving the velocity distribution. The periodic mean field on r-6 plane at different axis positions showed that the flow within the vaned diffuser, especially within the inlet region, was periodic unsteady when impeller located at the different circumferential position, just as the flow within the vaneless diffuser.

有叶扩压器内平均流场的分析表明，在定常流动的假设下，不同流量工况下有叶扩压器的内部流动也呈现为沿轴线向后盘方向推移流动状况逐渐恶劣的分布规律，表明二元叶片构成的平行直壁有叶扩压器对轴向不均匀流动的掺混作用仍然不大。

Based on the generalized potential energy variational principal of nonlinear elasticity theory with large deflection, the incomplete generalized potential energy functional with large deflection is established on the space coupling free vibration of three-span self-anchored suspension bridge by considering the effect of axial compressive and shearing strain energy of stiffening girder.

摘 要：摘要：基于大位移非线性弹性理论的广义变分原理，考虑了加劲梁轴向压缩应变能和剪切应变能的影响，建立了三跨自锚式悬索桥空间耦合自由振动的大位移不完全广义势能泛函，通过约束变分导出了自锚式悬索桥的竖向挠曲振动、横向挠曲振动、纵向振动及扭转振动的基础微分方程，为自锚式悬索桥的固有振动性状分析提供可靠的理论依据。

Its acoustic radiation by axis excitation, transverse excitation and their combination and their frequency-response function from 0~2kHz by the step of 2Hz are evaluated, and its modal analysis of structural-acoustic coupling is performed. Some conclusions are obtained.

主要研究了航行器在几个频率点的轴向激励、侧向激励以及它们的组合的声辐射；计算了这几种激励下0~2kHz的频率响应函数；进行了声振耦合的模态分析；探讨了肋对航行器声辐射特征的影响。

The affected factors to the whisht intensity of pipeline is analysed in two aspects: defectiveness and non. In the non-defectiveness aspect, the tranversing pipeline is considered as thin-wall container, and the annulus stress emerged from inner pressure as main stress on base of stress influence colligated with temperature and inner pressure, then amends it with the axis orientation stress, with the 4th intensity theory, we can calculate the whisht intensity of river tranversing oil pipeline.

从有缺陷和无缺陷两个方面对管道静强度的影响因素进行了分析，在无缺陷穿越管道的静强度分析中，是将穿越管道视为薄壁容器，并在综合考虑温度和内压对管道的应力影响的基础上，把由内压引起的环向应力当作主要应力，再用轴向应力加以修正，根据强度理论计算相当应力，从而实现了穿越河流输油管道的静强度计算。

This paper introduces an analytic method of quick north seeker , whose principle is to use gyro to sense the component value of the angle-rate of the earth rotation, with which the northern azimuth angle between the referenced shaft of carrier and actual ...

本文提出一种基于解析的快速寻北方法，其原理是利用陀螺仪敏感地球的自传角速率分量，并由此计算出载体的参考轴向与真北方向的夹角，即偏北角。

This paper introduces an analytic method of quick north seeker , whose principle is to use gyro to sense the component value of the angle-rate of the earth rotation, with which the northern azimuth angle between the referenced shaft of carrier and actual north angle can be measured.

本文提出一种基于解析的快速寻北方法，其原理是利用陀螺仪敏感地球的自传角速率分量，并由此计算出载体的参考轴向与真北方向的夹角，即偏北角。

Based on the simulation data, the effects of clearances, damping coefficient and the rotation speed on the dynamic behaviors are studied: compared with ideal mechanisms, mechanisms with clearances are less stable; as for mechanisms with clearances, when the crank rotates at the speed of 100rad/s, the actual clearances are always above the radium of clearances, axle pin and axle cover keep contact throught the rotation; when the crank rotates at the speed of 20rad/s, mechanisms are in an unstable state, at an angle of about 300, the actual clearances are below the radium of clearances, pairs lose contact, which results in collision between them; with the speed of 20rad/s, when damping coefficient is assumed 175Ns/m, distinct separation and collision happen between pairs; when damping coefficient is assumed 220Ns/m, separation and collision are controlled.

在含间隙机构中，当曲柄以100rad/s转动时，运动副间隙始终大於半径间隙，轴销与轴套始终保持连续接触；当曲柄以低速20rad/s转动时，系统处於极不稳定的震荡状态，在转至300°左右时，运动副间隙小於半径间隙，脱离接触，发生明显的分离碰撞现象。在含间隙机构中，曲柄以低速20rad/s转动，当取法向阻尼系数为175Ns/m时，副元素发生明显的分离碰撞现象；当取法向阻尼系数为220Ns/m时控制了副元素的分离，副元素一直处於连续接触状态。

For example, before the slice force curve each step of cylinder is completed, force of inertia,top side gas force,shaft side gas force are required, per curve will possess 36 calculation spots at least.

尤其动力计算中采用非传统的解析法进行往复惯性力、盖侧气体力、轴侧气体力、切向力曲线的绘制使得压缩机切向力曲线的合成变得非常简便，计算过程解决的

Based on the higher-order Cauchy-Born constitutive model, a seriers of infinitesimal mechanical properties and the strain energy for the graphite sheet and SWCNT are studied firstly with the consideration of the influences from tube chirality and radius, potential parameters and the inner displacement.

基于所发展的高阶Cauchy-Born广义连续体本构模型，首先对石墨片和单壁碳纳米管的一系列无限小变形的力学特性(如：轴向和环向模量、泊松比、剪切模量)以及应变能进行了研究，同时也考察了手性、半径、势能参数以及内位移放松等因素对这些力学特性的影响。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。