基于3DSMAX的摩擦离合器的三维实体造型及动画的制作

详细介绍了摩擦离合器的各组成部分及运动原理,重点分析了典型零件在3DSMAX中的建模过程及动画制作,以及视频文件的生成。     

圆柱齿轮减速器可靠性优化设计与实体造型

考虑应力和强度的随机性,运用机械优化设计理论,按给定的可靠度作为齿面接触和齿根弯曲疲劳强度约束条件,建立单级斜齿圆柱齿轮减速器多目标可靠性优化设计数学模型,以确定齿轮传动参数。应用SolidWorks软件进行减速器实体造型设计并利用COSMOSMotion插件实现了运动仿真,探讨了减速器计算机辅助设计实用可行的新方法。     

基于共轭包络原理的齿面生成计算机模拟与仿真

以共轭齿面包络原理为理论基础,布尔运算为方法,商用三维软件为工具,进行了齿轮加工制造的计算机模拟与仿真研究.取磨前滚刀加工圆柱齿轮为对象,给出了刀具与齿轮之间相对运动关系v12的计算机实现过程,和在商用软件平台上实现齿面包络生成原理的方法与步骤.文中提出的方法无需推导齿轮实体的曲面方程就能够准确、真实地模拟制造过程,建立实际的齿轮齿面几何模型,为复杂曲面零件的CAD/CAE建模与分析提供了新途径.     

3T-1R并联平台机构实体建模

基于3T-1R并联平台机构的概念模型,使用CAXA实体设计软件建立了各部件的参数化模型和机构的虚拟样机.设计完成的虚拟样机结构合理、外形逼真,可以直接用于工程分析和设计优化.     

基于ISO13584标准的螺纹实体模型的实现

螺纹是许多标准件中的主要结构,因此螺纹实体模型的实现便成了开发标准件库的重要问题之一。文中依据ISO13584标准,以UG为CAD平台,提出了一个交互式的,采用三维曲面构造参数化螺纹模型的算法。阐述了三维螺纹实体模型的实现原理,开发了数据接口,实现了几何图形文件到UGGRIP语句的映射,并举例介绍了螺纹模型的GRIP程序。     

基于Pro/E的6-HTS并联机床虚拟样机参数化实体建模

基于平行滑块式6-HTS并联机床的概念机模型,建立了其各个结构部件的参数化实体模型及虚拟样机实体模型装配体。由于虚拟样机的所有部件的实体模型采用的都是真实尺寸而且是参数化的,得到的虚拟样机模型非常逼真。     

Factorial Modeling for Transient Solid Particle Velocity in a Fluidized Bed Combustor Cold Model

Transient hydrodynamics phenomena in the fluidized bed combustor (FBC) freeboard have been critical in the past two decades. Within a 152 mm ID FBC cold model, solid particle transient velocities were measured and analyzed with the assistance of advanced laser-based particle image velocimetry (PIV) instrumentation. Two layers of swirling secondary air were injected into the cold model. The PIV system was applied to the FBC cold model to visualize transient solid particle velocity. A series of transient solid particle velocity profiles were generated for the factorial analysis. In each profile, the solid particle velocity vectors (Vx and Vy) for 10 × 10 grids were generated. Analysis of variance (ANOVA) was used to determine the significant factors that affect transient solid particle velocities, time, and position coordinates. Then, the 10¹⁰ factorial design method was used to develop a specific empirical model of transient solid particle velocity in the FBC freeboard, which was in the shape of V_x = f₁(t, x, y) and V_y = f₂(t, x, y).

This unique factorial analysis method proved to be a very effective and practical method to evaluate experimental conditions and analyze experimental results in the FBC systems.     

基于ISO13584标准的渐开线圆柱齿轮三维实体模型的实现

依据ISO13584标准开发了渐开线圆柱齿轮的一个中性程序,同时开发了数据接口(编译器).在UG软件中,把中性程序转化为UG可以识别的GRIP程序,并实现了与UG已有标准件库的连接.阐述了渐开线圆柱齿轮实体模型在上述标准件库中实现的算法.因没有沿空间曲线扫描的GRIP函数可供使用,故采用缝合自由曲面与有界平面的方法来解决这个问题.举例介绍了算法的实现.     

Factorial Modeling for Transient Solid Particle Velocity in a Fluidized Bed Combustor Cold Model

ABSTRACT

Transient hydrodynamics phenomena in the fluidized bed combustor (FBC) freeboard have been critical in the past two decades. Within a 152 mm ID FBC cold model, solid particle transient velocities were measured and analyzed with the assistance of advanced laser-based particle image velocimetry (PIV) instrumentation. Two layers of swirling secondary air were injected into the cold model. The PIV system was applied to the FBC cold model to visualize transient solid particle velocity. A series of transient solid particle velocity profiles were generated for the factorial analysis. In each profile, the solid particle velocity vectors (Vx and Vy) for 10 × 10 grids were generated. Analysis of variance (ANOVA) was used to determine the significant factors that affect transient solid particle velocities, time, and position coordinates. Then, the 10¹⁰ factorial design method was used to develop a specific empirical model of transient solid particle velocity in the FBC freeboard, which was in the shape of V_x = f₁(t, x, y) and V_y = f₂(t, x, y).

This unique factorial analysis method proved to be a very effective and practical method to evaluate experimental conditions and analyze experimental results in the FBC systems.     

实体造型及其二维图形转换技术在包装机械设计中的应用

介绍运用AutoCAD进行实体造型，再将其转换为二维图形，从而获得零件图的方法，该方法可以显著提高包装机械的设计效率。