共查询到20条相似文献，搜索用时 62 毫秒
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阐述了齿数Z对齿轮强度的影响，通过分析可使设计在设计过程中，能够优化地选择齿数，使设计结果更加合理，满足不同场合的工作需要。 相似文献
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李润 《兰州石化职业技术学院学报》2012,12(1):16-18
应用Pro/E参数化和行为建模技术,实现齿轮的优化设计,分析零件的质量如何随齿轮齿数的变化而变化。首先在Pro/Engineer的建模环境中完成齿轮零件的三维建模,在完成优化设计的数学模型定义之后,转换到Pro/Mechanica工作环境中,通过灵敏度分析找出关键的设计变量（齿轮的齿数）对优化目标进行优化,从而可以根据设计者的特定要求分析出最佳的设计结果。该方法可以推广应用于其他零件的结构设计中。 相似文献
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曹新林 《Journal of Zhangzhou Technical Institute》2002,4(3):38-40
本篇探讨机械CAD在软齿面齿轮设计中对模数和齿数相关选定中的应用,即在中心距一定时,齿数的选定既要受最小数的限制,同时也要满足齿根弯曲疲劳许用应力也就是说在相关其它参数选定后,利用机械CAD迅速找出(满足条件下)合理的齿数和模数,从而避免选定初的盲目性和随意性。 相似文献
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曹新林 《漳州职业大学学报》2002,4(3):38-40
本篇探讨机械CAD在软齿面齿轮设计中对模数和齿数相关选定中的应用，即在中心距一定时，齿数的选定既要受最小数的限制，同时也要满足齿根弯曲疲劳许用应力也就是说在相关其它参数选定后，利用机械CAD迅速找出(满足条件下)合理的齿数和模数。从而避免选定初的盲目性和随意性。 相似文献
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行星齿轮减速器的最优化设计 总被引：1，自引：0，他引：1
介绍了行星齿轮减速器单目标优化问题数学模型的建立。在以体积为最小的基础上,以优化模数、齿数、齿宽为主要目标的单目标函数,并用内点惩罚函数法进行寻优,进行迭代得到最优解。通过对具体实例进行分析,结果表明该方法经济可靠,是一种具有工程实用价值的设计方法。 相似文献
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渐开线内齿轮范成仿真 总被引：1，自引：0，他引：1
基于VB.net语言开发了齿轮插刀加工内齿轮的范成仿真实验,实现了渐开线内齿轮范成仿真的参数化、可视化和网络化访问。通过改变齿数、齿顶高系数、压力角和变位系数模拟内齿轮范成加工过程和径向进刀顶切现象。齿轮范成仿真不需要安装任何插件就可以在计算机或手机上进行,能够自动评定学生的实验成绩。为配合仿真实验还设计制造了渐开线内齿轮范成仪,拓展了齿轮范成仪的种类,达到了与仿真实验虚实结合、优势互补的教学效果。教学实践表明,内齿轮范成仿真实验较好的达到模拟分析和拓展知识面的教学目的。 相似文献
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参数化设计利用参数来描述零件尺寸,设计时通过修改基本参数来更改零件的外形,实现参数对图形的驱动.文章运用UG软件对渐开线直齿圆柱齿轮进行三维建模,将设计参数和三维模型进行关联.通过改变直齿轮的齿数z、模数m和齿宽B等基本参数,即可迅速精确地生成所需的直齿圆柱齿轮三维模型,实现了渐开线直齿圆柱齿轮的参数化设计. 相似文献
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目前常用的挂轮计算方法有因式分解法,近似计算法及对数法等。这些方法的缺点在于没有给出精确度或者得到的齿轮齿数不是常备齿轮组中所具有的。本文以一组常备齿辊组为根据,借用“优选法”及“电子计算机”等工具从中选出符合精度要求的挂轮。 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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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 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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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 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