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采用三维CAD软件Pro/E的开发平台和二次开发模块Pro/Toolkit,在c 开发环境下对渐开线齿轮进行参数化设计,通过利用友好的图形用户界面技术输入设计参数来控制三维实体建模.该文以开发渐开线齿轮参数化CAD系统为实例,详细阐述基于Pro/Toolkit二次开发程序设计的实现过程. 相似文献
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基于特征的参数化建模是将特征造型技术与参数化技术有机地结合起来,实现对多种设计方式和设计形式的支持的一种建模方法．特征模型也使CAD、CAPP、CAM等系统共享统一的产品数据模型成为可能．并以轴类零件为例,较为详细地阐述了基于特征的零件参数化建模技术的实现方法． 相似文献
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斜齿轮是参数化建模的热点与难点。当前较为流行的斜齿轮参数化建模方法仍存在曲线的近似替代、齿形生成随意、无精度检测方法等一系列问题。为解决上述问题,从齿条型刀具加工齿轮的范成原理入手,推得齿廓渐开线方程与过渡曲线方程;参数化建模所需基本模型,通过PRO/E的参数化建模功能完成斜齿轮的建模;并提出了一种斜齿轮模型精度的检验方法。 相似文献
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本文介绍了参数化设计的概念和建模方法,以及大型软件Pro/E的参数化建模的种类,并利用pro/E中Pro/Program对数控机床床身及工作台进行参数化建模。 相似文献
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刘敏 《扬州职业大学学报》2008,12(1):35-38
利用PRO/E软件,对一种新悬挂式结构座椅进行建模.并用ADAMS软件对座椅的垂向振动特性进行仿真分析,提出该座椅进行结构参数化设计的具体方法.仿真结果证明悬挂式结构座椅具有频率稳定、舒适性好和适于步兵战车安装等特点. 相似文献
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直齿圆柱齿轮精确的参数化建模及有限元分析 总被引：1，自引：0，他引：1
利用Pro/E强大的参数化设计功能,对直齿圆柱齿轮进行精确的参数化建模。通过修改基本参数,可以快速生成所需齿轮,提高了设计效率。然后通过Pro/E与ANSYS之间的无缝连接,将模型导入ANSYS中,利用有限元法对齿轮进行应力分析,对模型的导入、单元的选择和载荷的施加都进行了详细的说明。发挥了Pro/E的建模优势和ANSYS突出的有限元分析优势,为进一步齿轮传动的优化设计奠定了基础。 相似文献
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基于 CAD 和 CAE 软件的集成设计是现代设计趋势之一。如何将参数化 CAD 建模与有限元分析相结合是一项挑战性工作。通过改变模型参数实现自动建模和有限元分析的研究很少。探讨基于 SolidWorks 尺寸驱动的弹簧参数化建模与基于 Python 的 ABAQUS 二次开发进行有限元分析相结合的方法。在 VB 界面中,通过人机对话窗口对可变参数赋予不同的参数值,自动生成一系列圆柱螺旋压缩弹簧模型。将模型导入 Abaqus有限元软件,采用 Python 语言进行 CAE 模块编辑。将参数化技术与有限元计算有机结合,建立弹簧参数化设计与 CAE 分析系统,实现 CAE 分析的自动建模。实验结果表明,该方法可以得到合理的有限元分析结果。采用基于参数的设计与分析方法,可以缩短设计周期,得到合理准确的结果,且成本较低,弹簧分析方法也适用于其它机械零件。 相似文献
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胡斌 《九江职业技术学院学报》2008,(3):22-24
CAD技术在产品设计中具有重要地位,Pro／E作为具有CAD／CAM／CAE综合功能的软件得到广泛应用。本文主要介绍了参数化设计在机械设计中的应用,特别针对某些特征相似而造型复杂的零件的设计,参数化设计提供了便利快捷的解决方案。 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献