共查询到20条相似文献，搜索用时 79 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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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
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Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 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,(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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陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 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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《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