查询词典 numerical analysis

Based on this theory we deduce related equations of expansion force in plate and build elements of plate and magnetic field. After the analysis of magnetic field by FEM and some numerical computation we get the critical value of magnetic field when plate buckles.

在实现了用有限元对磁场进行三维分析基础之上，基于磁致应变假定，推导出相应等效载荷的计算公式，完成了恒定磁场作用下磁弹性矩形薄板的屈曲分析，求得了板屈曲时的磁场临界值。

Moreover, second-winding current waveform of a current transformer is calculated under the transient current of the typical short-circuit fault by numerical method. The analysis shows that the relevant protection equipment may refuse to trip when the fault current is extra high. It will result in the maloperation of protective relays for loss of their selectivity, and cause other protective relays to operate beyond range, and extend the scope of shutdown of power supply.

在这些回路出口处发生相间直接短路等严重故障时，流过相应TA一次侧的故障电流可能达到TA额定工作电流的100倍以上，大大超过了保护用TA的10%误差容许倍数，将使TA严重饱和，从而影响相关的保护设备的动作性能，因此有必要对在这种特大电流作用下的TA的传变特性做一些探讨，以分析其对继电保护装置动作特性的影响及应采取的措施。

Combined hourglass control in analysis of cold ring rolling process;2. Recent status and development of real-time measurement and online control technology in cold ring rolling ;3. The influence law of feed rate of idle roll on the quality of end face of ring,axial width spread ratio,roll force,roll moment and metal flow characteristic in cold ring rolling process has been explored through the FEM numerical simulation of the ring with rectangular cross-section based on the elastic-plastic dynamic explicit FEM under the Abaqus software environment.

基于Abaqus/Explicit提供的显式动力学有限元算法，对矩形截面环件冷辗扩进行了有限元数值模拟，揭示了芯辊进给速度对环件冷辗扩过程中环件端面质量、轴向宽展率、辗扩力、辗扩力矩以及金属流动特性的影响规律，并从金属塑性成形原理和塑性加工力学等角度对这些规律进行了合理的解释，从而获得了进给速度对冷辗扩成形的影响规律，为环件冷辗扩在实际应用中进给速度的选择提供了依据，对揭示冷辗扩成形机理也具有十分重要的意义。

Integrating full numerical simulation method of furnace with coal characteristic analysis, the paper makes a more complete prediction of furnace slagging. The aerodynamic field, gas temperature field and original ash layer temperature field are studied.

本文采用炉内过程全模拟的方法，对炉内的空气动力场、烟气温度场和原生灰污层表面温度进行分析，并结合煤灰结渣特性判别准则，对炉内结渣状况作出较为完整的预报。

Qinhuangdao 066004, P.R. China）Abstract: On basis of the theory of metal plastic fluid and research of die cavity on non-axis-symmetry extrusion of special-shaped products, in virtue of mathematical research results of the conformal mapping theory,by using method of normal convergence, numerical value analysis of mapping function was built.

摘 要：针对非轴对称金属异型挤压塑性流动及模腔研究的理论课题，借助于近代共形映射数学理论研究成果，利用法线收敛法，建立了映射函数解析方法。

The research result provided the effective calculational model and numerical method for the design and analysis of composite flywheels. And it offered the valuable reference to similar rotor structures and composite structures.

本文的研究成果为复合材料飞轮的设计与分析提供了有效的计算模型和数值计算手段，同时为类似的复合材料结构件转子的研制与开发提供了有价值的参考。

Moreover, detailed numerical result is presented, particularly for a four-phase, namely quadrature oscillator, which is in accordance with the proposed theoretical analysis.

关于多相位和正交相位振荡信号产生的早期研究包括Millar[4]和Takao[5]等人的工作，振荡信号由两个或多个电感耦合的真空管振荡器产生。

The problem of oscillation of temperature field numerical solution of blast furnace gas and stock temperature field is solved by the upwind finite element analysis , and the working conditions of blast furnace with the center coke charging is analyzed.

将迎风有限元法引入高炉煤气和炉料温度场解析，解决了强对流条件下温度场数值解的失真振荡问题，分析了中心装焦时的高炉炉况。

In this paper. Based on the analysis of chemical process equipments , the virtual manufacturing architecture for the chemical process equipments were discussed. As an example , the digital modeling approach , numerical simulation , virtual design and virtual manufacturing environment for the spiral gas liquid separator were studied.

在分析化工过程装备特点基础上，对过程装备虚拟制造技术平台的体系结构进行了探讨，以典型过程装备螺旋片导流式气液分离器为例，对其数字化建模方法、数值仿真技术、虚拟设计和制造环境进行了研究。

Taking velocity moment as controlled variable, the formulas were deduced to calculate quasi-3D inverse problem for uniform stream model of guide pulley. According to the theory of two relative flow surfaces and the force analysis of air bubble, the formulas were deduced to calculate quasi-3D direct problem while gas and liquid running in the guide pulley of multiphase pump, and a method was provided to carry on quasi-3D numerical calculation of inner flow filed.

以速度矩作为控制参数，推导出多相泵导轮中均匀流模型的准三维反问题计算公式；基于两类相对流面理论及气泡的受力分析，推导出气、液两相在多相泵导轮中运动的准三维正问题的计算公式，提出一种对多相泵导轮内流场进行准三维数值计算的方法。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。