数值技术

Lasers characteristic as a shock wave drive and the advantages of KrF laser are explained. Finally, the progress at home and abroad is enumerated.In chapter two, the basic principle of the EOS study is introduced. Specially, the impedance mismatch effect of the double-layer flyer is mentioned here. It is the primary theoretical basis of this paper.In chapter three, a one-dimension, three-temperature hydrodynamic code HYADES is introduced briefly. it is used to make a qualitative analysis about how the thickness of ablator affect the flyer velocities and stability.In chapter four, the experimental setup is described.

第一章为绪论部分，简要总结了状态方程研究的历史，激光作为冲击波驱动源的特点和KrF激光的优势，以及国内外的进展情况；第二章是本工作的理论基础，讨论了冲击波物理和雨贡纽曲线测量的基本原理和方法，重点介绍了激光飞片法的特点、关键要素和双层飞片的阻抗失配效应，鉴于KrF激光短波长和长脉宽的特点，我们拟对双层飞片的特性展丌研究工作，为实测状态方程做好准备；第三章简单介绍了一维三温流体力学数值模拟程序Hyades并运用它进行了若干状态方程实验的计算和设计，进行了烧蚀层厚度对飞片速度、稳定性的影响的定性分析；第四章是实验平台描述部分，介绍了光束平滑化技术，靶的制作，条纹相机的原理和使用，系统同步控制以及光学记录速度干涉仪系统的简单原理和构成。

Laser's characteristic as a shock wave drive and the advantages of KrF laser are explained. Finally, the progress at home and abroad is enumerated.In chapter two, the basic principle of the EOS study is introduced. Specially, the impedance mismatch effect of the double-layer flyer is mentioned here. It is the primary theoretical basis of this paper.In chapter three, a one-dimension, three-temperature hydrodynamic code HYADES is introduced briefly. it is used to make a qualitative analysis about how the thickness of ablator affect the flyer velocities and stability.In chapter four, the experimental setup is described.

第一章为绪论部分，简要总结了状态方程研究的历史，激光作为冲击波驱动源的特点和KrF激光的优势，以及国内外的进展情况；第二章是本工作的理论基础，讨论了冲击波物理和雨贡纽曲线测量的基本原理和方法，重点介绍了激光飞片法的特点、关键要素和双层飞片的阻抗失配效应，鉴于KrF激光短波长和长脉宽的特点，我们拟对双层飞片的特性展丌研究工作，为实测状态方程做好准备；第三章简单介绍了一维三温流体力学数值模拟程序Hyades并运用它进行了若干状态方程实验的计算和设计，进行了烧蚀层厚度对飞片速度、稳定性的影响的定性分析；第四章是实验平台描述部分，介绍了光束平滑化技术，靶的制作，条纹相机的原理和使用，系统同步控制以及光学记录速度干涉仪系统的简单原理和构成。

The dynamic meshing technique was adopted to realize the 3-D transient numerical simulation of vehicle overtaking process in order to study the influence of relative velocity and absolute velocity on the aerodynamic characteristics of the overtaking and overtaken vehicles during the overtaking process.

为了研究超车过程中相对车速和绝对车速对汽车气动特性的影响，采用动网格技术实现了超车过程的三维瞬态数值模拟。

Determination of laser absorptivity of metal by numerical calculation technique and trial-and-error method .

用数值计算技术和试错法确定金属材料表面对激光的吸收率。

Combined with dumm y damping parallel circuit,the voltage prediction can eliminate partially the sam pling tim e delay of input and output data transfer thus resulting in current noise reduction and a numerical stability im provement,which can achieve an overall simulation stability in steady and transi...

利用电压预测技术，结合&虚&阻尼并联支路，可以有效地减小接口电流噪声，提高 RTDS数值计算稳定性，保证数模接口在稳态和暂态仿真中的稳定。各 AC/DC接口的电压预测步长需独立精心选择，典型值在 1个～ 3个步长，取决于直流平波电抗值的大小和直流输电线的长度。文中给出了接口的技术实现和性能校验结果。

According to the technical requirement of 800 kV tank SF6 circuit breaker and aiming at the initial structure of bushing of circuit breaker, the numerical calculation of electric field and analyses of insulating performance were conducted based on the technical and engineering conditions.

以800kV罐式SF6断路器为主要研究对象，根据超高压断路器产品的技术要求，针对断路器出线套管初步设计结构，在满足产品技术条件和工程要求前提下，进行基于电场数值求解绝缘性能分析。

Advances in computational technology and in physics-based modeling are making detailed simulations of large-scale and complex syst...

数值模拟技术和对物理过程的建模技术的飞速发展，使得对大型复杂的推进系统的仿真已经成为现实。

Numerical simulation and optimization of process parameters in fineblanking process;2. As fineblanking 's wide application in different industries, such as auto mobile, aircraft and general mechanicals, the finite element analysis of fineblanking is playing a more and more important role in the process from design to manufacture.

随着精冲技术在汽车制造、航空器制造、通用机械等领域越来越广泛的应用，针对精冲过程的有限元数值模拟也越来越成为目前精冲应用领域从设计到制造的重要环节，而网格剖分是精冲成形有限元分析的关键技术之一。

As fineblankings wide application in different industries, such as auto mobile, aircraft and general mechanicals, the finite element analysis of fineblanking is playing a more and more important role in the process from design to manufacture. Mesh generation is also one of the key techniques of fineblanking numerical simulation.

随着精冲技术在汽车制造、航空器制造、通用机械等领域越来越广泛的应用，针对精冲过程的有限元数值模拟也越来越成为目前精冲应用领域从设计到制造的重要环节，而网格剖分是精冲成形有限元分析的关键技术之一。

Emphasis is given to the ultrasonic guided wave technology and modal acoustic emission technology, including the propagation characteristic of guided waves, the method of experiment and numerical simulation etc.

着重对超声导波技术和模态声发射技术在管道检测中的最新应用进行了评述，内容涉及超声导波的传播特性、实验检测方法及其数值模拟等。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。