查询词典 dynamic viscosity

In order to study the dynamic characteristics of the locomotive driving system at high speed, A dynamic model of the universal transmission shaft was made and differential equations were formulated by means of Roberson Witternberg method.

为了研究转向架传动系统在高速运行时的动力学特性，文中以万向传动轴为对象，利用R－W方法建立了系统的力学模型和动力学微分方程。

The behavior of austenite dynamic recrystallization and dynamic transformation within the temperature range of 1100~750℃ was studied for a low carbon steel with a composition of 0.18C-0.22Si-0.60Mn.

对成分为0.18C-0.22Si-0.60Mn的低碳钢在1100~750℃之间的奥氏体动态再结晶及动态相变行为进行了研究。

ITD is adopted to get dynamic parameters of Bell Tower within traffic vibration amplitude for the first time,on this basis,the stiffness of mortise and tenon joint calculation model is derived through inversion,the questions of dynamic parameters unable to be identified with the traditional methods in environmental noise and the similar timber structure is unreasonably calculated due to tenon and mortise connection stiffness cannot be accurately determined are solved.

在此基础上，通过反演得到木结构榫卯连接计算模型的刚度，解决了噪声环境中无法按传统方法进行动力参数识别及类似木结构由于榫卯连接刚度不能准确确定而无法进行合理计算的问题。

Finally, based on the theory of Timoshenko beam, a beam model of this crankshaft is built, which is compared with solid model. The results indicate that this beam model can meet the needs of calculation precision and calculation efficiency. With this beam model, the condition in which real loads are put on the crankshaft is simulated. The displacement curves、velocity curves、acceleration curves of the main journals and the pulley of this crankshaft and torsion vibration curve of the pulley are then gained. With these curves, the dynamic characteristic of the crankshaft is analyzed. The conclusion indicates that this crankshaft has good dynamic characteristic.

最后利用Timoshenko梁理论建立了曲轴的梁单元模型，将此梁单元模型与体单元模型进行了比较，结果表明梁单元模型能够满足精确度和计算效率的要求；利用该梁单元模型，模拟了实际条件下的载荷作用时曲轴的响应，得到了曲轴各主轴颈和皮带轮端的位移、速度、加速度曲线以及皮带轮端的扭转振动曲线，分析了曲轴的动态特性，结论表明该型曲轴具有良好的动态特性。

The flexible workpiece vibration modes are available for partitioning the distinct machining stages that denote the dynamic variation characteristics of the workpiece in the process and for selecting the high-order dynamic frequency modes that can produce the displacement at the tool-cutting position as the virtual vibration modes to predict the cutting stability.

根据薄壁零件的振型模态，划分表示工件在加工过程中动态特性变化的不同加工阶段、选取能够在刀具切削位置激起振动位移的高阶动态频响模型作为预测切削稳定性的有效振型。

The static and dynamic deformation of the machine tool spindle system is the main reason which affects the machining accuracy. So the static and dynamic analysis of the spindle system structure plays an important role in the design of machine tool.

机床主轴系统的静态、动态刚度是影响机床加工精度的主要原因之一，因此机床主轴系统的静、动态性能分析在机床设计中占据重要地位。

ABSTRACT Based on the analysis of recent research on machine tool spindles at home and abroad, this thesis makes the thorough study on the dynamic behaviour and static stiffness of machine tool spindles and develops a new kind of machine tool spindle of good dynamic behaviour.

本文在分析国内外机床主轴部件研究现状的基础上，深入研究了机床主轴部件的动、静态性能，并开发了一种新颖的具有优良动态性能的高阻尼机床主轴部。。。

The dynamic analysis of main body and valve type orifice system was conducted and the dynamic models were developed for studying external characteristics of three-cylinder internal combustion water pump.

为研究三缸内燃式水泵的外特性，对主运动系统和配流阀系统进行动力学分析，建立了动力学模型。

Machine length sensor self-cleaning devices, in the conventional sensors on the dynamic of relative calm on both sides of the face were bonding of soft oil, such as blankets, foam plastics, and its work Static can be in the process of sweeping the dirt, and maintain dynamic and static parts of the Clean due to long-term use of sensor cleaning demolition also maintain satisfactory accuracy, and its structure is simple and practical and lower sensor maintenance workload.

91227818#机床长度检测传感器的自清洁装置，其在常规传感器的动件上相对静件的工作面的两侧分别粘接耐油柔软物，如毛毡、发泡塑胶等，其工作过程中可清扫静件上的污物，保持动、静件间的清洁，而使传感器长期使用不拆卸清洗亦保持满意的精度，其结构简单实用，降低了传感器的保养工作量。

In order to get accurate measurement result,this paper proposes an error dynamic amendment method and uses it in the online dynamic measurement system of clean surface composite board.

给出一种误差动态修正方法，该方法基于对额外设置的基准块的动态测量及计算机对数据的自动修正，在具有光洁表面的板材厚度的在线测量中得到了较好地应用。

I'm going tor her!

我这就去救她！

As rise are design to help keep a several toney , a brain chemical at continues lever.

SSRI被设计来帮助保持血液中的复合胺即在大脑中一个连续水平的化学物质。