静力学

When calculating with three-dimensional finite element method, the elastic-plastic geomechanics model is adopted to simulate the condition of slope, so the slope stability can be analyzed in terms of stress and strain.

运用三维有限元法计算时，采用弹塑性力学模型，分别对静力作用下和动力作用下坡体的稳定性状况进行了模拟，从应力、应变的角度对边坡的稳定性进行分析。

By using static gap element theory, calculating the drill string friction through nonlinear mechanics iterative, the size and distribution rule of friction are found .

本文利用静力间隙元理论方法，对钻柱摩阻力进行非线性力学迭代计算，得出摩擦阻力的大小及其分布规律。

The system consists of four parts such as Data Management of Product Model,Finite Element Analysis, Optimal Design and Graphics Drawing; and its main work is searching for an optimal scheme of chief axis with Sequential Quadratic Programming Method by finite element static and dynamic characteristical analysis of the axis and saving the results of design as documents or outputing them.

系统出产品模型数据管理、有限元分析、优化设计和图形绘制四部分组成。通过对车床主轴二维垂直剖面力学模型的有限元静、动态特性分析，采用序列二次规划的优化设计方法寻求主轴设计的优化方案，并将优化设计结果形成文档或输出。提出产品设计模型的概念，通过它可自动生成有限元分析模型、优化设计模型和图形模型三个子模型，将有限元分析、优化设计、图形绘制三部分结合在一起。

Based on dynamic equilibrium equations of three-dimensional elasticity, a state equation was established for orthotropic foundation plates using double Fourier series, in which no assumption about stress or displacement modes was made. Analytical solutions and frequency equations of unified formulas were presented for thin and thick laminated foundation plates.

从三维弹性力学动力平衡方程入手，抛弃应力或位移模式的人为假定，利用Fourier双重级数，建立了正交各向异性地基板的状态方程，并分别给出了地基上任意层厚薄板静力问题的统一解析式和动力问题的频率方程。

And then, considering the size and trait of MAST, the reasonable cut-off position on the car body and the fixing method of the forebody on the simulation table were decided in line with the car body's static and dynamic properties.

然后根据车身的静、动态力学特性并结合MAST多轴模拟试验台的尺寸，确定了车头在整个车身上的合理截断部位以及在试验台架上的固定方案。

The discrete mathematical models of the roundness and cylindricity EST are established; the mathematical models of the generating line straightness, axis straightness, coaxality, circular run—out and total run—out error of the revolution workpiece are put forward and established first based on the EST; the method about how to sample and to process sampling data are given when these models are applied to measure workpleces.

其主要内容是：针对长期以来国内对回转误差运动的有关定义的争论，对回转误差运动的本质进行了讨论，进一步明确了静心与静轴，动心与动轴的概念，并对此进行了数学推导，给出了相应的数学模型；统一了"平动说"和"瞬心说"关于回转轴线的定义，指出了两种学说各自的力学基础和它们的一致性。

The mechanical effects that hole-rate acts on hole medium are considered under the effect of impactive static water by the equivalent strain,and the evolutive equation of hole-rate is given.

利用等效应变法考虑了孔隙率对孔隙介质在冲击静水作用下的力学行为的影响，并得到了孔隙率演化方程。

Using the prevalent relation of no converse thermodynamics of elastic-plastic medium and the Baider free energy,the mechanical actions of elastic-glutinous-plastic hole medium are researched under the effect of impactive static water.

利用弹塑性介质的不可逆热力学的普遍的关系，采用德拜形式的自由能对弹粘塑性孔隙介质在冲击静水作用下的力学行为进行了研究。

Ultra-high pressure vessels are widely applied in the fields and industries of chemical, petrochemical, artifical crystal, compound diamond, isometrical hydrostatics treatment, ultra-high hydrostatics extrusion, powder metallurgy, material moulding, physical geography, geologic mechanism etc.

超高压容器广泛运用在化学、石化、人造水晶、合成金刚石、等静压处理、超高静液压挤压、粉末冶金、金属成型、地球物理和地质力学等行业或领域。

On the basis of analyzing forces on the self-supported column, the superposition method in mechanics of material was used to calculate the steady deflection at top of the high column under both of weight and distributed wind pressure. The results show that the effect of weight to top deflection of the heavy weight high column can not be ignored and a formulation is deduced to express this effect.

在对自支承式塔设备建立合理的力学模型并进行受力分析的基础上，采用材料力学中的叠加法，计算了高塔设备在均布风载荷、自重联合作用下的塔顶静挠度，提出对于自重和长细比均较大的高塔，塔体自重对塔顶挠度的影响不可忽视，并推导出了计算这种影响的表达式。

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％。