主应力

The relationship between the optimal direction of roadway axis and the direction of the maximum principal stress is analyzed in this type of geostress field.

分析了在该类型的地应力场中，最优巷道布置方向与最大主应力方向的关系。

The direction of the maximum principal stress is N 54.2°±3.3°E and does not change with depth.

最大主应力方向为N 54°±3.3°E，且方向不随深度变化。

It is shown that, its structure design is reasonable. Under the design working conditions, the maximum principal stress of the sideboard is 13.8 MPa,and its dynamic strength is satisfied.

分析表明，该振动筛的结构设计合理，且在设计工况下，筛箱侧板的最大主应力为13.8 MPa，其动强度满足要求。

The orientation of horizontal maximum principal stress is about the NS- trending.

水平面内最大主应力的方向基本为SN方向。

Based on our own simulation results and results of some numerical simulation of single Fold structure by other investigators in recent years, the factors that affect single fold shapes and the variation of maximum principal stress and horizontal strain during the deformation of single fold are discussed in this paper.

本文结合近年来单层褶皱构造数值模拟研究进展，以及笔者近几年来对单层褶皱所进行的数值模拟实验研究，主要论述了单层褶皱变形的影响因素，单层褶皱变形过程中的最大主应力与水平应变的变化及其影响因素等。

Firstly, We studied the maximum principal stress and horizontal strain during the deformation of single fold and multi-layer fold and the effect of strain velocity on fold deformation under compressive stress.

本论文首先主要对单层和多层褶皱变形过程中最大主应力的变化与水平应变之间的关系，以及应变速率等因素对褶皱变形的影响进行了研究。

Based different types soil arching,the paper think fricton soil perhaps come into being mojor or minor principal soil arching when the pile spacing was different.

在分析了不同的土拱类型的基础上，指出根据不同的桩间距桩间土拱分别以大、小主应力拱存在。

Rock and soil mechanics ; Drucker-Prager criterion ; shear strength ; intermediate principal stress ; plane strain condition

岩土力学； Drucker-Prager准则；抗剪强度；中主应力；平面应变状态

The new theory unifies a series of the single nonlinear strength theories for various concrete materials, which includes the whole region between the upper-limit Mises circular and the lower-limit SMP curve on the π plane of principal stress space, and the strength curves on the meridian plane are the exponential functions.

该理论在主应力空间的π平面上含盖了从下限SMP曲线到上限Mises圆之间的所有区域，子午面上的破坏曲线为幂函数形式；共有四个材料参数，均具有明确的物理意义，并给出了参数的确定方法。

Calculation results show that peaks of the maximum principal stresses move toward the surface of chamber after reinforcement, with the self-bearing capacity of rock increased and the plastic zone decreased. In addition, displacement of walls reaches 41.4 mm, that of roof, 22.1 mm, and that of heave, 6.45 mm. Further more, force of supports is in a rational scope.

采用FLAC(上标 3D)软件对原支护方案和返修加固方案进行了数值模拟，结果表明：修复加固后，最大主应力峰值外移，塑性区范围减小，围岩承载能力增强，两帮移近量41.4mm，顶板移近量22.1mm，底鼓量6.45mm，支护受力合理。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。