查询词典 principal axes of stress

The stress path that prevails in a pavement under wheel loading includes stress reversal causing rotation of the principal stress direction.

在车轮的荷载作用下，整个路面的应力过程包括导致主应力方向发生旋转的应力反向。

Utilizing the expression of maximum deviatoric stress yield rule on π plance and the relationship betwen π plane and principal stress this paper deduces and examines the shape and position of maximum deviatoric stress yield rule on π plane and the relation to Mises circle and Tresca hexagon .

利用π平面与主应力空间的关系及最大偏应力屈服准则在π平面上的表达式，推导验证最大偏应力屈服准则在π平面上图形的形状、方位及其与Mises圆和纯拉伸Tresca六边形的关系。

Based on the description of Mohr-Coulomb and Drucker-Prager yield criteria with invariant of stress, a formula for error estimation of unit strain energy between the two stress states is established in the deviatoric plane of the principal stress space, which satisfies M-C and D-P yield criteria respectively. A general procedure to transform M-C material parameters to D-P analysis parameters is obtained.

基于应变比能的概念，在偏平面内建立了分别进入Mohr-Coulomb和Drucker-Prager屈服面时所需形状改变比能的差值公式，获得M-C材料参数向D-P计算参数等效的统一性方案。

After soil slaked, in view of the effect of soil slaking deformation, stress and stress level evidently drop. The difference of maximal principal stress on the bottom of waterishlogged field between before or after slaked goes nearly to fifty percent in the case.

分析了在堤基为上强下弱、堤基为深厚的强透水层等多种情况下，各种垂直防渗墙（全封闭式防渗墙、半封闭式防渗墙和悬挂式防渗墙）的适用条件和防渗方案的优化等，同时探讨了防渗墙的渗透系数对防渗效果的影响。

Although axiomatic systems and proof method for temporal logic have found so far relatively few applications in the query language modeling of temporal database and that was proved by Gabbay, et al in 1994, the model of time axes still must be built axiomatically, which owns soundness and completeness and depicts the time axes in fine grain.

尽管在1994年，Gabbay等人论证了时态逻辑的公理化系统和证明论方法是不适合于时态数据库查询语言建模的，但是仍需要通过对时间轴的公理化建模，利用公理化系统的可靠和完全等性质对时间轴作"细精度"的语义刻画。

This design wants to design a complete set of three axes five speed gearboxeses , it mainly include three parts : The first part , to make sure the basic parameter of the gearbox assurance ; The second part, The contact strength verify-check and the flection strength verify-check of each wheel gear of the gearbox, mainly verify whether each wheel gear satisfy various strength conditions with according to the giving parameter ; The third part , to progress verify-check intension of the axes Four-part cent, to calculate the life of the bearings.

本次设计是要设计一部较为完整的五档变速器，其中主要包括三部分：第一部分，变速器基本参数的确定；第二部分，变速器的各档齿轮的接触强度校核和弯曲强度校核，主要是根据所给的参数来验证各档齿轮是否满足各项强度条件；第三部分，进行轴的强度校核；第四部分，轴承的寿命计算。

This paper expounds the approach to simulation of the roller gear indexing cam based flexible cam axes,and studies the method of forcing between flexible cam axes and rigid graduator to set up the model for simulation of the roller gear indexing cam based rigid-flexible coupling .

阐述了在考虑凸轮轴柔性条件下实现弧面分度凸轮机构运动仿真的途径和步骤，结合有限元技术和虚拟样机技术，研究了如何在柔性体凸轮轴与刚体分度盘之间施加作用力的思想和具体实现方法，为该机构的刚柔耦合运动仿真提供了基础模型

Through the study of relationship between generatrix linearity and axes linearity of deep bore, we proposed the new principle and method to measure axes linearity of gunbarrel by measure of generatrix linearity.

从深孔的母线直线度与轴线直线度之间的关系入手，论述了在火炮身管直线度测量中，如何通过测量母线直线度求得轴线直线度的原理和方法。

The key technology of this method is to quickly converge the sensitive axes of the mechanical gyroscope to the intersection line of the meridional plane and the horizontal plane based on the principle of gyroscope compass, to isolate payload from platform disturbance with the gyroscope and two degrees of freedom gimbals, to obtain the attitude angle of the platform by electro-optical sensor on the gimbals, and to make the sight slaved to the sensitive axes of the gyroscope to realize the indirect stabilization.

利用陀螺罗经原理，使机械陀螺的敏感轴快速收敛于子午面和水平面的交线上，并借助陀螺定轴性和2自由度环架，使陀螺隔离运动载体的扰动；通过环架上的光电传感器测出运动载体的姿态角，使观瞄镜的瞄准线随动于陀螺的敏感轴，实现间接稳定。

The disposal of magnetic pole In order to decrease magnetic hysteresis loss ,Magnetic poles are put along the axes of rotor and magnetic flux parallel the axes of rotor.

2处置磁极为了减少磁磁滞损耗，磁极是把沿轴线和转子磁通平行轴线的转子。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。