数值技术

This article expatiates and argumentations contents as follow: background and meaningof study the task, basis concept of system simulation, technology of seeable, the theory of inner trajectory and test data analysis, inner trajectory numerical value simulation and test result analysis, computer simulation analysis system of shell in internal ballistic test, technology exploitation scheme of 3D simulation software and so on.

本文对研究课题的背景及意义、系统模拟仿真的基本概念、可视化、内弹道模型与试验数据分析理论、内弹道数值模拟与试验结果分析、炮弹内弹道试验计算机仿真系统、三维仿真软件开发技术方案等内容进行了阐述和论证。

On the basis of the optical image principle, the computational flow imaging can generate numerical pictures similar to experimental images such as shadowgraph, schlieren-graph and interfere-graph.

基于光学成像原理，计算流动显示技术可以将数值计算的结果转换成类似于实验照片的图像。

The output property of this pulse shaper is numerically analyzed in theory, and the results are same as experimental ones.

在理论上数值计算了该全光脉冲整形器的输出特性，理论计算结果和实验结果相一致，并为"快点火"实验提供了一条可行的技术途径。

In view of the questions in theoretic analysis and numerical simulation with the finite element method,the separation criterion of chips, the surface contact, the setting of friction coefficient,and the thermal stress coupling are researched. A simulation example is presented by applying the finite element analysis software-ANSYS,and the change of stress and strain in metal cutting process, the forming of shear plane and the influence of the temperature field on metal cutting are analyzed. The tool's strength is also analyzed.

基于理论分析和实际有限元数值模拟计算中遇到的问题，研究、讨论了切屑分离标准、表面接触、摩擦系数的设定、切屑与工件之间的连接以及热应力耦合分析等各项技术，并应用大型有限元分析软件ANSYS，具体分析了金属切削过程中应力和应变的变化、剪切面的形成以及温度场对金属切削的影响，并依此对刀具作强度分析，得到若干结论。

In SHET, equations which represent relation of fundamental component and preparatory eliminated harmonic components are a system of nonlinear, transcendental equations that require the interative Newton-Raphson matrix method for its solution, and convergence in solution depends on whether or not starting value given is right.

特定消谐技术中，表征基波及各次谐波幅值与开关角关系的方程组为非线性超越方程组，一般只能采用牛顿迭代法等数值方法求解，而解的收敛性取决于所给初值的正确与否。

With the development of science and project technology, more and more questions need the solution of big linear systems. This solution is one of the fastest ways for researching numerical algebra, especially for the big sparse matrix.

随着科学和工程技术的发展，越来越多的问题需要求解大规模的线性方程组，对这类方程的快速求解已成为数值代数研究的热点之一，特别是具有稀疏结构的大型方程组的求解。

The thermal effect and specific heat capacity effect of internal EGR were analyzed theoretically. The results show that the engine in cylinder gas flow is very sophisticated.

采用数值模拟技术研究了二冲程柴油机的气体流动特性，计算了不同扫气压力下的内部EGR率，理论分析了内部EGR的高温作用和比热容作用。

The research mainly focuses upon the unique deformation mechanism, forming method, quality control and parameter optimization, and the key technologies in Finite Element Analysis for the 3D Non-Axisymmetric thin-walled tube spinning. A CNC spinning equipment for the 3D Non-Axisymmetric thin-walled tube has been designed and manufactured based on the experimental investigation of the forming method.

着重研究变形机理、成形方法、质量控制及优化成形工艺参数，解决三维非轴对称零件旋压成形过程数值模拟关键技术；通过对成形工艺方法的试验研究，研制出能够旋压成形三维非轴对称薄壁空心零件的工艺装备。

In this paper the application of spline function is discussed in the view of computer animation making.

本文从电脑动画制作角度讨论了样条函数的应用，并介绍了一种计算机固化技术可采用的B样条算法，通过改变一些关键数值和改进编程技巧，更好的运用这个算

The importance of starlike inner race no-flash die forging process of automobile constant velocity universal joint is introduced.

介绍轿车等速万向节星形套闭塞模锻工艺的必要性，通过数值模拟方法研究该工艺过程，研制出了可生产应用的闭塞模锻液压模架，并进行了工艺试验，研究结果对汽车关键零部件闭塞模锻工艺选择和模具设计提供了技术指导。

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。