在AutoCAD环境下实现参数化机械绘图

本文介绍了当前参数化技术的发展现状及在ＡｕｔｏＣＡＤ环境下实现参数化机械绘图的方法。     

基于参数化设计的麻花钻头及其仿真验证

分析了麻花钻头的加工过程,对钻头螺旋槽的成型过程中的主要参数进行了介绍.重点对钻头加工中的正问题进行研究,即对给定砂轮截面型线计算螺旋槽的端面型线,并建立了坐标系与刀片曲线的坐标方程,给出了曲线方程的详细求解过程.最后将本文的设计结果与商业软件模拟结果进行对比,结果表明在设计的线形上基本一致,细微的差别,主要是导向角不同而引起的.     

刀具系统参变量化智能CAD绘图

以盘形铣刀为例，阐述如何利用ＡｕｔｏＣＡＤ１２．０功能，发挥Ｑｕｉｃｋ ＢＡＳＩＣ，以及ＭＳ－Ｃ的优势，进行二次开发，实现标准刀具与非标准刀具变参数化设计与参变量化智能ＣＡＤ绘图的基本方法与途径。     

二级同轴式减速器零件参数化绘图软件设计

基于 Auto CAD平台上的二次开发 ,借助于开发工具 ADSRX,编译环境 Visual C++。针对减速器进行了设计 ,开发了二级同轴式减速器零部件参数化绘图软件 ,实现了减速器零部件图纸的快速生成。     

F & SCAD 分离机械 CAD 软件

Ｆ＆ＳＣＡＤ是以广泛流行于世界的ＡｕｔｏＣＡＤＲ１４ｆｏｒＷｉｎｄｏｗｓ９５为平台的分离机械专业ＣＡＤ系统。包括：用户化二次开发、通用机械零部件优化设计计算及绘图、国标件参数化图形库及工程数据库、分离机械设备选型专家系统、常用国产过滤介质性能及选用数据库、分离机械型式与基本参数标准库、有限元结构分析、离心机（分离机）工艺及结构参数计算、工程图纸信息管理等功能模块。     

MS的参数化设计模块用于零件尺寸自动标注

本文介绍了采用ＭＩＣＲＯＳＴＡＴＩＯＮ参数化设计增值模块ＰＬＴＯＯＬ进行零件尺寸自动化标注的方法。将字符作为视图处理，动态地建立字符图形的描述文件。用户只需在参数化设计模志中增加一个尺寸描述文件，即可实现尺寸标注功能。本方法为方便地进入ＭＩＣＲＯＳＴＡＴＩＯＮ核心提供了一条作径，也可供其它ＣＡＤ软件借鉴。     

基于APDL的柔性减振法兰盘的参数化设计

研究了柔性减振法兰盘的参数化设计问题，基于ANSYS的参数化编程语言APDL，开发了面向振动问题的法兰盘参数化设计程序。应用程序对典型法兰盘进行参数化设计，不仅解决了法兰盘在工作过程中的振动问题，还为其他同类产品的设计开发提供了有效的工具。     

A multiple snow layer model including a parameterization of vertical water channel process in snowpack

Tohkamachi Experimental Station in Niigata prefecture, Japan, which is located along the Sea of Japan, usually has heavy snowfall in the winter. At this site, melting snow and rain are frequently observed in the middle of winter, because it has a higher temperature than other cold regions. As a consequence, water frequently infiltrates through the snowpack, creating vertical water channels. In this study, a new parameterization of the water channel process was implemented in a multiple snow layer model, which already had the infiltration process represented using the Darcy's law.The conceptual procedure used to model the water channel was based on the impermeable processes through which water infiltrates into dry snow and a new snowpack. The model does not consider the impermeable processes associated with a capillary barrier at the boundary between the fine textured upper layer and the coarse textured lower layer or at the boundary between the snow upper layer and the ice lower layer. The new parameterization controlled the vertical water flux at the wetting front layer just above the dry snow layer by a limiter which was expressed as the threshold value of the liquid water content. The water which should go through the water channel was removed at the uniformly infiltrated part of the snowpack.We found that the new water channel process implemented in this study worked well when it was applied to a rainfall event in the middle of winter, based on the vertical structure in the snowpack with a comparison between the pit observations and the simulated results. This comparison showed that the simulation with the water channel was more accurate than that with uniform infiltration. The seasonal mean of the agreement scores with the parameterization of the channel flow (0.91) became larger than the score under the uniform flow condition (0.79).