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布尔运算的
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  boolean operation
    Based on 7-axis robot for auto composite fiber placement,the collision and interference between the machine and the core model are analyzed. The digital model of the fiber placement robot is established and the inspec- tion algorithm is studied based on Boolean operation of solid models.
    基于七自由度复合材料纤维铺放机器人,对铺放过程中可能出现的碰撞干涉情况进行分析,建立了铺放机器人三维数字化模型,研究了基于实体布尔运算的碰撞干涉检测算法。
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  boolean operation
Inspired by digital technique, we introduce two kinds of boolean operation into GA to develop a novel mutation operator and discuss its contribution to preventing the loss of critical alleles.
      
This separation makes the Boolean operation process simple and robust.
      
Using Graftree, the Boolean operation produces no risk of yielding topological conflicts, which often cause the simulation to stop abnormally.
      
The method has been powered adding a multi-layered, bit-masking oriented data structure and a boolean operation based control mixer, allowing special blended crossover operators obtained by superposition of the standard ones.
      
Then, through a Boolean operation of the splint blank and the maxilla-mandibula model, the dental splint model is formed.
      
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The modeling method of circular symmetrical structure is discussed by using finite element software (ANSYS) .At the same time,three dimenional modeling process of solid rocket engine is analyzed.It is iluminated how to make use of Boolean Operation in soild modeling.It is useful for beginner of ANSYS study.

讨论了应用有限元分析软件(ANSYS)对循环对称结构的建模方法.分析了固体火箭发动机三维实体建模的过程,就建模中使用布尔运算(Booleanoperation)的注意事项进行了说明,对初学ANSYS软件者来说是非常有益的.

Structures of aircraft composite parts include honeycomb, inner contained part, inner empty part, and layered etc. These structures are hard to design by traditional boundary modeling system. But by using the DEXEL based on modeling system and Boolean operations, it becomes easy. By calculating the intersections between a group of DEXEL rays and planar polygons of an object, the object is dexelized. By using big VOXEL, the color or texture of a volume is rendered. This system is programmed under Java2.0 and...

Structures of aircraft composite parts include honeycomb, inner contained part, inner empty part, and layered etc. These structures are hard to design by traditional boundary modeling system. But by using the DEXEL based on modeling system and Boolean operations, it becomes easy. By calculating the intersections between a group of DEXEL rays and planar polygons of an object, the object is dexelized. By using big VOXEL, the color or texture of a volume is rendered. This system is programmed under Java2.0 and Java3D. To test this algorithm, one design example, one rib of an aircraft wing, is given.

飞机复合材料零件结构分为蜂窝结构、夹心结构、空心结构、夹层结构等。在以边界面表示的体造型系统中,难以设计这些复杂结构。在提出的基于DEXEL体造型系统中,通过布尔运算可很容易设计这些复杂结构。通过射线组群与多边形的求交算法实现体的DEXEL化。通过基于DEXEL模型的布尔运算实现复杂体设计。通过大体素可显示体的颜色与材质等属性。该系统在Java2.0与Java3D环境下编程实现。为验证该算法,给出了一个飞机水平安定面翼肋设计实例。

An integral wing panel is represented as feature sets,and the features are decomposed as information sets such as location,direction,geometric size,Boolean operation etc.The features are mapped by optimizing and unfolding curved surfaces.The supercritical airfoil′s integral wing plane panel is modeled rapidly through the decomposition,mapping and reconstruction of the features.A shoot-peen formation experiment indicates that the size of the plane panel formed by using the feature mapping method reaches the accuracy...

An integral wing panel is represented as feature sets,and the features are decomposed as information sets such as location,direction,geometric size,Boolean operation etc.The features are mapped by optimizing and unfolding curved surfaces.The supercritical airfoil′s integral wing plane panel is modeled rapidly through the decomposition,mapping and reconstruction of the features.A shoot-peen formation experiment indicates that the size of the plane panel formed by using the feature mapping method reaches the accuracy as its design requires.

将整体壁板分解为特征的集合,并进一步将特征分解为特征的位置、方向、几何尺寸、布尔运算等信息的集合。采用曲面优化展开映射实现了特征映射,通过特征的分解、映射与重构解决了超临界机翼整体壁板板坯快速建模的问题。喷丸成形实验表明,采用特征映射法计算完成的板坯成形后尺寸达到了设计要求的精度。

 
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