应力

Concretely, firstly with Timoshenko beams, the fundamental formulae of solutions of dynamical equations, boundary conditions and initial conditions have been transformed by Laplace transformation. Secondly, in the Laplace regions , we gain the analytical solutions of impact forces at the impact contact points, shear and maximum inverse stress of beams. Then, by using Durbin numerical inverse method, we gain the numerical solutions of Timoshenko beams under various restriction conditions. Moreover, the graphs about impact forces at the impact contact points, shear and maximum inverse stress of beams can be obtained too.

把Timoshenko梁力学模型动力学方程的基本解形式、边界条件以及初始条件进行Laplace变换，在Laplace区域得到了冲击接触处的冲击力、整个梁的最大弯曲应力和剪力的解析解，然后利用Durbin数值反演的方法得到了各种约束条件下的Timoshenko梁模型时间-空间的数值解，得到了冲击接触处的冲击力、梁各处的最大弯曲应力和剪力的曲线图。

In order to check the bolt strength and find the weakest region of the Gatling gun's bolt, the FEA model of bolt was built by using the finite element software Ansys. After simulation, the stress nephogram was obtained corresponding to the maximum pressure.

为检验机芯的强度，找到机芯强度最薄弱的部位，针对某转管武器的机芯，利用有限元分析软件 Ansys，建立了机芯应力分析的有限元仿真模型，通过仿真得到了机芯在膛压最大时的应力分布云图。

Based on the stress-strain relationship, tests, no tensile stress of masonry and assuming resistance submit gauss distribution, the resistance equations and its statistic parameters are obtained.

从圬工材料的应力—应变关系曲线出发，并假设圬工材料不抵抗拉应力，推导出了截面抗力的表达式并根据现有的试验资料统计，假设抗力服从正态分布，统计出分布参数。

By integral transformation of basic equations, the stress and displacement expressions with unknown coefficients of elastic and viscoelastic materials were obtained in Laplace domain respectively, and introducing dislocation density functions, the singular integral equations were got according to the boundary conditions and interface connection conditions, further adopting Gauss integration and Gauss-Jacobi integration formula, the problem was reduced to algebraic equations, then it can be solved with the method of collocation dots in Laplace domain. Finally, the time response of dynamic stress intensity factor was calculated with the inverse Laplace integral transformation.

采用积分变换方法，得到Laplace域内弹性和粘弹性材料的应力和位移的含未知系数的表达式；引入位错密度函数，并通过边界条件和界面连接条件，导出反映裂纹尖端奇异性的奇异积分方程组，采用Gauss积分，并运用Gauss-Jacobi求积公式化奇异积分方程组为代数方程组，利用配点法进行求解；最后经过Laplace逆变换，求得动态应力强度因子的时间响应。

The protrutive relation was set to reestablished the articulation. The geometry model constructed in CAD software was put into MSC.PATRAN to set the concrete Three-dimensional Finite Element Model. Result revealed (1) Tensile stress distributed in the posterior-upper area; molar area.(2) Compressive stress distributed in the opsile molar area and gonion area .

本研究通过模拟下颌前伸时，对下颌骨骨组织应力变化进行三维有限元分析[3 ，8] ，了解下颌骨骨组织应力分布特点，为临床矫形治疗提供理论依据。1 材料与方法1.1 建立几何模型1.1.1 病例选择选择一名年龄 12岁的男孩，X线手腕骨片显示处于生长发育高峰前期，全身发育正常。

The two methods are presented for non-stationary leakage signals based on original feature gradate. One is a combination of the peak-peak and grads, the other is mean energy method, with the methods eliminate influence of noise and the stress concentration identification is improved. Based on the relativity for wavelet coefficient square, the signal singularity detection theory of wavelet transform was employed to determine metal magnetic memory. Experiment shows that the method is valid for leakage signal.

针对含有噪声非平稳性的漏磁信号，在原有信号特征量梯度的基础上，给出了新的时域空间梯度和峰-峰值组合特征量，以及能量峰值处理方法，有效消除了随机噪声对磁记忆信号的影响，提高了应力集中区的识别率；从磁记忆信号的奇异性检测角度出发，通过多尺度小波系数的平方相关一致性来确定真正的应力集中区；实验验证了所提方法的有效性。

Stress-Strain Diagram—Graph of stress as a function of strain. It can be constructed from

应力-应变图表—应力和应变的作用曲线，从任何机械试验得到的数据都可以建立这

These employ superimposed subspace/graviton force beams which focuses interference patterns on a remote object.

这项结果会在一个有意义的空间中产生一个应力，然后将应力加在目标上。

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。

Then the pile-soil stress characteristics and stabilizing mechanism of the composite foundation are fully discussed. Based on the close analysis of the influence factors of the vertical bearing capacity, circular aperture extension theory is employed to establish the computing formulas for the pile vertical stress and the foundation vertical bearing capacity, respectively. Moreover, with analyzing the features of the calculation parameters such as materials of gunite mortar, jet pressure, diameter of the jet pipe, pile length, pile layout, a design theory for chemical churning pile composite foundation is proposed. Then, the variation of the pipe deformation with loads, the deformation coordination of pile and soil are studied. And methods to decide pile-soil stress ratio and the compressive modulus are developed. Meanwhile, the corresponding design method and the design parameters are proposed. In addition, studies for construction technique and quality detection of the chemical churning pile composite foundation are presented.

在此基础上深入探讨了旋喷桩的桩土受力特性及其复合地基的加固机理，从影响旋喷桩复合地基竖向承载力的因素入手，基于圆孔扩张理论给出了桩体竖向应力及旋喷桩复合地基的竖向承载力计算公式；通过对喷射浆液、喷射压力选取、喷射直径估算、桩长及桩位设计等各种计算参数的深入分析和研究，提出了一套相应的旋喷桩复合地基设计计算方法；通过计算分析，深入探讨了旋喷桩复合地基变形随荷载变化规律、桩和桩间土变形协调关系、桩土应力比及复合地基压缩模量的确定，并提出相应的设计方法和修正参数；此外，结合工程应用，对旋喷桩复合地基的施工技术及其现场质量检测方法进行了较全面的探讨。

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％。