应力

The variance of stress about particular points that situate on the edge where maximum stress point locates as the object function, we introduce complex method to optimize the position of exterior load point about pylon along the voyage direction and the angle between anti-swing stop and right-and-left symmetry plane about pylon under the determinate loads. We also compare the unoptimizable stress curves with the optimized to validate the feasibility and correctness of the optimization method.

将挂架上最大内应力点所在棱边的特征点的内应力方差作为目标函数，采用复合形方法对一定载荷状态下，挂架外载荷点沿航向的位置及防摆止动器与挂架左、右对称面间的夹角进行了优化设计，并将优化前、后的内应力曲线进行比较，验证了优化方法的可行性、正确性。

It is found that the former provide more uneven circular stress state than the latter after comparing the circular stresses both of intrados and extrados,which extrados stress is large and intrados stress is small.That is confirmed by the results of experiment that the practical burst pressure...

结论认为，内压作用下的弯管结构属于有力矩旋转壳，整体环壳第二弯曲半径由外拱区的正半径变化为内拱区的负半径，引起应力性质的变化，只考虑薄膜应力的弯管内压爆破理论存在不安全的因素。

The stress result conformed to the extreme value distribution, and it also manifested the randomicity of the stress produced by the wind load of tower under wind and ice storms.

得到的应力结果符合极值分布，同时也体现了塔设备在暴风雪下风载荷产生的应力的随机性。

Furthermore , maximum stress of casing of perforation cement hoop generates from eyehole and declines along pore diameter direction .

射孔水泥环套管最大应力在射孔孔眼产生，沿孔径方向应力减小。

The peak acceleration of the ground is very sensitive to the local variation of the stress drop on the fault plane.

5地面峰值加速度对断层面局部应力降的改变非常敏感，加速度值与应力降之间不是简单的线性比例关系。

Dynamic stress is caused by the radiation of seismic wave, so the dynamic stress is transient. The time that acted on fault plane in the vicinity is limited.

由於动应力是伴随地震波传播而出现的，因此，动应力变化量是暂态的，作用於邻近断层面上时间有限。

The main contents of this dissertation are as follows:(1) According to involved theories of ferromagnetics, the microscopic mechanism of domain structure is analyzed systematically; through the movement variation of domain structure, that is the movement of domain wall and rotation of magnetic moment, the magnetization process is illustrated in an applied magnetic field. Meanwhile, by the use of energy methods, a study is performed on influencing factors of domain movement including stress, dope, scattering field, etc. The influence of various energies is dealt with on the magnetic behavior and parameters of ferromagnetic material; the corresponding theories of the spontaneous magnetization and technical magnetization are also discussed.

本文以此为研究背景，通过理论分析和模型试验，系统地研究了钢结构全磁通应力无损检测技术的基本理论和应用方法，主要研究工作如下：(1)根据铁磁学的相关理论，分析了铁磁材料磁畴结构产生的微观机理，并通过对磁畴结构运动变化规律，即磁畴壁移动和磁矩转动规律的研究，分析了外磁场作用下铁磁材料的磁化过程与一般规律，同时采用能量分析方法，研究了影响铁磁材料磁畴运动的主要因素，包括应力、掺杂和弥散磁场等，探讨了各种能量对铁磁材料磁行为和磁参量的影响，研究了相应的自发磁化理论和技术磁化理论等。

Several factors are taken into account, such as design parameters, eccentricity ratio, loading history, quantity of carbon fiber reinforcement and space of straps.

结果 给出了柱的荷载挠度曲线、混凝土轴向应力的分布情况、纤维布应力的分布情况等。

It also discussed the affection of fillet radius of cross section on stress distribution.

并讨论了约束混凝土柱倒角对纤维应力分布和混凝土截面的应力分布的影响。

On the basis of investigation into problems in the rural road surface of Liaoning Province, we simulated the shear stress between surface layer and base layer by finite element method, changed the pavement structure parameters and traffic load conditions, and found out that overloading and frequency of speed-changes in longitudinal slope driving were the main factors of forming slippage in asphalt pavement.

在对辽宁省低等级公路路面病害调查的基础上，运用有限元分析软件对基层和面层间的剪应力进行模拟计算，通过改变路面结构参数和行车荷载，得出了面层和基层层间剪应力变化的一般规律。结果重载和车速在纵坡行驶时的频繁变化是导致路面推移现象的主要因素。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。