遗传算法支持下的孔组复合位置度误差评判

在孔组复合位置度误差评判过程中,用传统的数值优化方法一般难以找到符合最小条件判别准则的几何图框理想位置,尤其当位置度公差遵守最大实体要求且被测要素尚未达到最小实体尺寸时,被判为不合格的零件还有被修复的可能。针对上述问题,可利用自适应遗传算法全局搜索几何图框最佳位置,并在搜索过程中同时考虑遵守最大实体要求时的误差补偿因素的影响。此外,针对不合格零件进行的可修复性判别和修正量的计算,进一步降低了零件误废率。     

基于 MDT的三维参数化标准件库的建立

提出了一种基于MDT平台的、简捷、实用的建立三维参数化标准件库的方法,并以螺栓为例,叙述了实施该方法的基本过程和要求。     

基于滑移量的摩擦耗能结构动力分析

根据摩擦单元的力 -位移 -滑移量关系 ,建立了包含摩擦型单元的结构整体分析方法。算例分析表明 ,在结构中安装摩擦阻尼器可以大大地减小结构的地震反应     

仕女瓷画与诗文装饰

仕女瓷画诗文装饰,是以文学因素衬托仕女形象之美,从而提高陶瓷作品整体艺术效果的一种综合装饰艺术。以诗配画,可使作品诗情画意相融,意蕴深远,品位高雅。题诗瓷画作品内容丰富,形式多样。或表现闺怨生活,或反映上层女子闲逸生活,或再现历史女性人物故事等,大多表现爱情婚姻生活题材。     

二步法三维编织物仿真模型

为给二步法编织物的微观结构和相关力学性能分析提供基础模型,以二步法矩形三维编织物为例,在分析编织运动规律和纱线屈曲形态的基础上,将数学计算与图解法相结合,寻找编织物内交叉2根纱线间距离最小处.以压紧状态下交叉2根纱线相互接触却不相互干涉为条件,确定了编织物最小节长.以纱线在编织物内部呈直线、在编织物表面呈椭圆弧为中心路...     

管路系统的虚拟设计

针对各种管路系统中的管路在三维空间纵横交错，管路敷设设计工作纷杂繁复的问题，基于管路路径的三维空间数据和3DS Max平台，通过Max Script语言程序和实体造型技术，调用3DS Max的相关命令生成管路的三维实体模型；借助于虚拟现实硬件，在WTK软件平台上调用管路的三维实体模型，实现了管路系统的三维虚拟设计和真实感、沉浸感显示；讨论了WTK软件平台上图形用户界面的设计方法和步骤，完成了管路虚拟设计系统的用户界面设计。     

Physical dispersion state and fluorescent property of Eu-complex in the Eu-complex/silicon rubber composites

The fluorescent complex Eu(TTA)2(Phen)(MA) (HTTA=2-Thenoyltdfluoroacetone, Phen=l,10-phenanthroline, MA=Maleic an-hydrider) was synthesized and characterized with elemental analysis, infrared spectrum (IR), scanning electron microscope (SEM), X-ray Diffraction(XRD), differential scanning calorimetry(DSC), and fluorescent measurement. To explore the effect of different physical disper-sion state of Eu-complex on the fluorescent property of the Eu-complex/silicon rubber composites, various quantities of Eu(TTA)2(phen) (MA) were mixed with silicon rubber (SIR) and peroxide to form uncured composites. These composites were vulcanized to obtain cured Eu-complex/SiR composites at 250 ℃, which was higher than the melting-point of Eu-complex. The SEM, XRD, DSC, and the fluorescent measurement of these composites showed that both the complex molecules dispersed in the silicon rubber during the melting process and the parent Eu-complex particles had positive effects on fluorescent property, whereas the re-crystallized Eu-complex particles and the ggregating complexes formed during the melting-process had negative effects on fluorescent property. For the uncured composites, their fluorescent intensities almost did not change with the increasing amount of Eu-complex. Furthermore, for the composites with small content of Eu-complex, their fluorescent intensities decreased significantly after curing, and this difference in fluorescent intensity became smaller as the content of Eu-complex increases.     

双曲型法向圆弧齿轮副的点啮合设计与啮合效率

双曲型法向圆弧齿轮是一种将圆弧齿形拓展至交错轴齿轮传动的新型传动技术。在双曲型法向圆弧齿轮传动原理的基础上,提出齿廓的点啮合设计方法,推导啮合齿面的数学模型;在综合考虑摩擦力和摩擦力矩的情况下,进行速度分析和受力分析,推导双曲型法向圆弧齿轮副的啮合效率公式,分析主要设计参数对效率的影响。研究结果可为双曲型法向圆弧齿轮副的优化设计提供理论参考。