主应力

The results are valid only for load with speed lower than Rayleigh wave velocity in ground.

以单个轮轴移动荷载为例，分析地基土单元的应力状态变化、主应力轴旋转以及荷载速度的影响。

The principal stress caused by latitudinal inertial force for a homogeneous earth is Northeast and Northwest oriented.

纬向惯性力引起的应力，在均匀地球的情况下，主应力方向为NE向和NW向。

We use Finite Element Method to simulate the isoclinic and isochromatic patterns of photoelasic experiments and the fringes while the secondary principle stress varies along the path of light and the secondary principle direction fixed.

以有限元素模拟光弹应力分析中，散射式光弹中沿光通过路径其次主应力方向改变之条纹影像。

The stress distribution and peak stress values of Maximum principle stress and shear stress were used for comparison.

选择具有代表意义的最大主应力和剪应力指标进行结果的评价。

Second, by analyzing the strain of northsouth blocks of the fault, we find an asymmetric displacement distribution between the two sides of the rupture, and the two blocks are subject to compressional and tensional stress respectively. It is a pattern that cannot be explained with the linear elastic theory. However, laboratory experiments and in situ measurements in boreholes have shown that many crustal rocks exhibit a nonlinear elastic behavior in compression and tension with a dependence of the Young's modulus on the minimum principal stress. So we suggest that the nonlinear displacement distribution should be considered when dislocation and hypocentral parameters are analyzed.

进而通过对地震南北盘同震应变的分析，发现了昆仑山地震的南北两盘分别受挤压和拉张两种应力作用，研究表明多种岩石在拉张和压力作用下其最小主应力下的杨氏模量表现出非线性弹性特征，从而提出对昆仑山地震地表位移及震源特征参数分析时应考虑非线弹性介质导致的非线性弹性位移分布特征。

The failure criterions of principal stress, octahedral stress and strain space are established.

建立了主应力、八面体应力和应变空间的混凝土破坏准则。

If a word has three or more syllables, there is a primary stress and a secondary stress.

如果一个词有三个或更多的音节，有一个主应力和二次应力。

For lower chord,the maximum secondary stress was less than 20 percent of the primary stress and the effect is small, therefore it can be neglected in design.

对于下弦杆，次应力的最大值均不超过主应力的20%，影响较小，设计时可不考虑。

The results show that the hydraulic fracturing pressure is intimately related with tensile strength and tridimensional stress state of the soil. With the increase of tensile strength and minor principal stress, the fracturing pressure is enhanced.

土体发生水力劈裂时的劈裂压力与土的抗拉强度和土体所处的应力状态之间有着密切的关系，劈裂压力随着土的抗拉强度和小主应力的增加而增加。

Through analyzing the surveying result and factors leading to cracks, it brings forth some details which should be taken care in future designing and constructing this type of bridges, such as computing theory of load transverse distribution factors, shear lags affection on web normal stress and principal stress.

通过对三门峡黄河公路大桥裂缝调查结果和产生原因的分析，提出了今后此类桥型在设计和施工中应注意的问题和细节，如：横向分布系数的计算、剪力滞效应对腹板正应力及主应力的影响等。

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。