重庆大学艺术学院 2015级非全日制工程硕士研究生第二阶段入学考试录取工作细则_重庆大学考研

重庆大学艺术学院 2015级非全日制工程硕士研究生第二阶段入学考试录取工作细则_重庆大学考研
重庆大学艺术学院 2015级非全日制工程硕士研究生第二阶段入学考试录取工作细则_重庆大学考研

重庆大学艺术学院2015级非全日制工程硕士研究生第二

阶段入学考试录取工作细则

根据国务院学位委员会《关于2014年招收在职人员攻读硕士专业学位工作

的通知》(学位办[2014]18号)和《关于做好2014年在职人员攻读硕士专

业学位录取工作的通知》(学位办〔2014〕43号)的文件精神,艺术学院

对2015级非全日制工程硕士研究生第二阶段入学考试录取工作决定如下:

一、复试录取工作小组

组长:许世虎教授

副组长:陈燕教授

成员:袁恩培教授高宁教授

秘书:徐静

二、复试时间安排

1.资格审查及专业笔试时间安排及具体要求详见重庆大学研究生招生信息

网https://www.360docs.net/doc/d44804966.html,/view.php?nid=342;

2.专业综合面试考试时间定于2015年1月3日下午2:30举行,考试地点

为虎溪校区艺术学院310教室;请各位考生于当日下午2:00准时到2-7研

究生办公室报到,联系电话65678202。

三、录取原则

1.复试工作结束后,按总成绩进行排序。根据学校下达招生指标,从高到

低择优录取;

总成绩=60%XGCT成绩+25%专业笔试成绩+15%专业综合面试成绩

其中专业笔试满分100分,专业综合面试满分100分

2.专业笔试成绩低于60分者不予录取;

3.专业综合面试成绩低于60分者不予录取。

文章来源:重庆大学考研网(https://www.360docs.net/doc/d44804966.html,),更多重庆大学考研相关信息和资料请关注文彦考研论坛。

重庆大学有限元考试题目

一、简答题 1、弹性力学和材料力学在研究对象上的区别? 答:材料力学的研究对象是杆状构件,即长度远大于宽度和厚度的构件。弹性力学除了研究杆状构件外,还研究板、壳、块,甚至是三维物体等。因此,弹性力学的研究对象要广泛得多。 2、理想弹性体的五点假设? 答:连续性假定、完全弹性假定、均匀性假定、各向同性假定、小位移和小变形的假定。 3、什么叫轴对称问题,采用什么坐标系分析?为什么? 答:如果弹性体的几何形状、约束状态以及外载荷都对称于某一根轴,那么弹性体所有的位移、应变和应力也都对称于这根轴,这类问题称为轴对称问题。对于轴对称问题,采用圆柱坐标比采用直角坐标方便得多。当以弹性体的对称轴为Z 轴时,则所有的应力分量,应变分量和位移分量都只与坐标r、z有关,而与θ无关。 4、梁单元和杆单元的区别? 答:梁单元和杆单元在形状上没有多大区别,其截面可以是任何形状,有一方向的长度远远大于另外两个方向。主要区别是受力不同,梁单元主要承受弯矩,杆单元主要承受轴向力。杆单元通常用于网架、桁架的分析;而梁单元则基本上可以适用于各种情况。 5、薄板弯曲问题与平面应力问题的区别? 答:平面应力问题与薄板弯曲问题的弹性体几何形状都是薄板,但前者受力特点是平行于板面且沿厚度均布载荷,变形发生在板面内;后者受力特点是当承受垂直于板面的载荷时,板在弯曲应力和扭转应力作用下将变成曲面板。 6、有限单元法结构刚度矩阵的特点? 答:主对称元素总是正的;对称性;稀疏性;奇异性;非零元素呈带状分布。7、有限单元法的收敛性准则? 答:完备性要求,协调性要求。 完备性要求。如果出现在泛函中场函数的最高阶导数是m阶,则有限元解收敛的条件之一是单元内场函数的试探函数至少是m次完全多项式。或者说试探函数中必须包括本身和直至m阶导数为常数的项。单元的插值函数满足上述要求时,我们称单元是完备的。 协调性要求。如果出现在泛函中的最高阶导数是m阶,则试探函数在单元交界面上必须具有Cm-1连续性,即在相邻单元的交界面上应有函数直至m-1阶的连续导数。 当单元的插值函数满足上述要求时,我们称单元是协调的。 8、简述圣维南原理在工程实际中的应用? 答:在工程实际中物体所受的外载荷往往比较复杂,一般很难完全满足边界条件。当所关心的并不是载荷作用区域内的局部应力分布时,可以利用圣维南原理加以简化。圣维南原理在钢管混凝土拱桥分析中的应用,能够得到合理的结果,优化了结构性能。圣维南原理在材料力学中也有应用,在工程实际中经常要计算连接件,如铆钉,螺栓,键等,由于构件本身尺寸较小,变形比较复杂,采用计算其名义应力,然后根据直接的试验结果,确定其相应的许用应力,来进行强度计算。 二、论述题 1、任何一个有限元分析问题都是空间问题,什么情况下可以简化为平面问题?轴对称问题?空间梁问题?为什么 答:当物体具有特殊形状,受特殊的外力,特殊的位移约束时,空间问题就可以简化近似的典型问题进行求解,所得到的结果能满足工程上的精度要求,而分析计算工作量大大减少。平面问题分为平面应力问题和平面应变问题,当研究对象一个方向的尺寸远小于另两个方向,外力和约束仅平行于板面作用而沿Z向不变,且仅有的三个应力分量是x、y的函数时,这样的空间问题就可以转换成平面应力问题;当研究对象一个方向的尺寸远大于另外两个方向的尺寸且沿长度方向几何形状和尺寸不变,外力平行于横截面作用而沿长度z方向不变,任意一横截面均可视为对称面,这样的空间问题就可以转换成平面应变问题,如挡土墙、重力坝。如果弹性体的几何形状、约束状态以及外载荷都对称于某一根轴(过该轴的任意平面都是对称平面),那么弹性体的所有应力、应变和位移也就对称与这根轴,这样的问题就可以转换为轴对称问题。当构件的长度远大于其横截面尺寸,如传动轴、梁杆等,这样的问题就可以转换为空间梁问题。 2、阐述有限元的基本思想。试从有限元程序开发和采用成熟软件两方面进行有限元分析 答:有限元的基本思想是将结构离散化,用有限个容易分析的单元来表示复杂的对象,单元之间通过有限个结点相互连接,然后根据变形协调条件综合求解。由于单元的数目是有限的,接点的数目也是有限的,所以称为有限单元法。 有限元程序开发:力学模型的确定;结构的离散化;计算载荷的等效节点力;计算各单元的刚度矩阵;组集整体刚度矩阵;施加便捷约束条件;求解降阶的有限元基本方程;求解单元应力;计算结果的输出。 成熟软件①前处理器:定义单元类型;定义材料属性;建模;约束,载荷施加等②求解器。单元刚度矩阵生成;约束处理;线性方程组,单元位移及应力等求解③后处理器:结果查询与显示;验算等。 3、有了本门课程的有限元分析技术基础,如果以后涉足机械方面的有限元分析,你觉得应从哪些方面深化学习和开展工作,具体采用哪些方式? 答:一、学习数学基础知识 (1)矩阵论,由于涉及到多维广义坐标下的运算,有限元多以矩阵的形式表达,力求简化形式,突出重点。(2)泛函和变分。泛函是寻找场函数在积分域上的最优值问题,变分是泛函研究的重要手段。(3)数值方法,有限元本身就是数值方法,在实现有限元分析的过程中,要用到大量的数值方法和算法。(4)数学分析,其中的多元函数积分,向量函数的积分应用较多。 二、学习程序实现和使用 (1)程序实现,有限元最终是通过程序实现的,有限元的理论研究与编程密不可分,应学习C或C++等语言。(2)程序使用,熟练掌握大型有限元程序,如ANSYS、SAP等,使用程序使用有限元,要注意观察程序的计算结果,有意识的根据单元的特性分析结果特点。 三、要有一定的力学基础 熟练理论力学,材料力学、结构力学,特别是弹性力学,很多工程中的有限元问题未能很好的解答,并非由于软件的功能所致,而是我们的知识不够。

重庆大学2015年硕士英语考试

开卷 闭卷 Part III. Translation from Chinese to English ( 20 points ) Part IV . Writing ( 20 points) (Please write your composition on the reverse side. 请写在背面) 命题(组题)人: 李雁 审题人: 黄萍 命题时间:2014.12 研究生院制 学院 专业(领域) 类别 ( 学术 、专业 ) 学号 姓名 封 线 密

重庆大学硕士研究生《英语》课程试卷 2014~2015 学年第一学期 硕士生B类 Part I. Reading Comprehension(40 points) Directions: Read the following passages carefully and then select the best answer from the four choices given to answer the questions or to complete the statements that follow each passage. Write your answer on your Answer Sheet. Passage One As a wise man once said, we are all ultimately alone. But an increasing number of Europeans are choosing to be so at an ever earlier age. This isn’t the stuff of gloomy philosophical contemplations, but a fact of Europe’s new economic landscape, embraced by sociologists, real-estate developers and ad executives alike. The shift away from family life to solo lifestyle, observes a French sociologist, is part of the irresistible momentum of individualism over the last century. The communications revolution, the shift from a business culture of stability to one of mobility and the mass entry of women into the workforce have greatly wreaked havoc on Europeans’ private lives. Europe’s new economic climate has largely fostered the trend toward independence. The current generation of home-aloners came of age during Europe’s shift from social democracy to the sharper, more individualistic climate of American style capitalism. Raised in an era of privatization and increased consumer choice, today’s tech-savvy workers have embraced a free market in love as well as economics. Modern Europeans are rich enough to afford to live alone, and temperamentally independent enough to want to do so. Once upon a time, people who lived alone tended to be those on either side of marriage—twenty something professionals or widowed senior citizens. While pensioners, particularly elderly women, make up a large proportion of those living alone, the newest crop of singles are high earners in their 30s and 40s who increasingly view living alone as a lifestyle choice. Living alone was conceived to be negative—dark and cold, while being together suggested warmth and light. But then came along the idea of singles. They were young, beautiful, strong! Now, young people want to live alone. The booming economy means people are working harder than ever. And that doesn’t leave much room for relationships. Pimpi Arroyo, a 35-year-old composer who lives alone in a house in Paris, says he hasn’t got time to get lonely because has too much work. “I have deadlines which would make life with someone else fairly difficult”. Only an Ideal Woman would make him change his lifestyle, he says. Kaufmann, author of a recent book called “The Single Woman and Prince Charming”, thinks this fierce new individualism means that people expect more and more of mates, so relationships don’t last long—if they start at all. Eppendorf, a blond Berliner with a deep tan, teaches grade school in the mornings. In the afternoon she sunbathes or sleeps, resting up for going dancing. Just shy of 50, she says she’d never have wanted to do what her mother did—give up a career to raise a family. Instead, “I’ve always done what I wanted to do: live a self-determined life”. 1.More and more young Europeans remain single because A. they are driven by an overwhelming sense of individualism. B. they have entered the workforce at a much earlier age. C. they have embraced a business culture of stability. D. they are pessimistic about their economic future. 2.What is said about European society in the passage? A. It has fostered the trend towards small families. B. It is getting closer to American-style capitalism. C. It has limited consumer choice despite a free market. D. It is being threatened by irresistible privatization. 3.According to Paragraph 3, the newest group of singles are A. warm and lighthearted. B. on either side of marriage. C. negative and gloomy. D. healthy and wealthy. 4.The author quotes Eppendorf to show that A. some modern women prefer a life of individual freedom. B. the family is no longer the basic unit of society in present-day Europe. C. some professional people have too much work to do to feel lonely. D. Most Europeans conceive living a single life as unacceptable. 5.What is the author’s purpose in writing the passage?

重庆大学有限元第二次作业(刘静老师)

【有限元分析技术】第二次作业 科 目: 有限元分析技术 教 师: 姓 名: 学 号: 班 级: 类 别: 学术型 上课时间: 2016 年 11 月至 2017 年 1 月 考 生 成 绩: 卷面成绩 平时成绩 课程综合成绩 阅卷评语: 阅卷教师 (签名) 大学研究生院

第一章 题目概况 1.1 原始数据 矩形板尺寸如下图,板厚为5mm ,弹性模量为522.010/E N mm =? ,泊松比为0.27μ= 图1.1 原始计算简图 1.2工况选择 (1)试按下表的载荷约束组合,任选2种进行计算,并分析其位移、应力分布的异同。 表1 两种不同工况的载荷及约束 序号 载荷 约束 备注 1 向下均布载荷P=5N/mm,作用于ab 边 c ,d 点固定 2 向下均布载荷P=5N/mm,作用于ab 边 a ,b 点固定 3 向下均布载荷P=5N/mm,作用于ab 边 a ,c 边固定 还可讨论a ,c 点固定 4 向下均布载荷P=5N/mm,作用于cd 边 c ,d 点简支 5 向下均布载荷P=5N/mm,作用于cd 边 a ,b 点简支 6 向下均布载荷P=5N/mm,作用于cd 边 a ,c 边固定 还可讨论a ,c 点固定 7 向下集中载荷F=1000N,作用于ab 边中点 c ,d 点简支 8 向下集中载荷F=1000N,作用于ab 边中点 a ,b 点简支 9 向下集中载荷F=1000N,作用于ab 边中点 a ,c 边固定 还可讨论a ,c 点固定 10 向下集中载荷F=1000N,作用于cd 边中点 c ,d 点简支 11 向下集中载荷F=1000N,作用于cd 边中点 a ,b 点简支 12 向下集中载荷F=1000N,作用于cd 边中点 a ,c 边固定 还可讨论a ,c 点固定 1.3 工况选择结果及分析任务 (1)工况选择结果 根据表1的工况,选取工况1,2,8进行对比分析,选取结果如表2所示,为了方便下文中分别将序号1、2、8的工况称为工况一、工况二、工况三。 表2 分析工况的载荷及约束 序号 载荷 约束 备注 1 向下均布载荷P=5N/mm,作用于ab 边 c ,d 点固定 工况一 2 向下均布载荷P=5N/mm,作用于ab 边 a ,b 点固定 工况二 8 向下集中载荷F=1000N,作用于ab 边中点 a , b 点简支 工况三

重庆大学多媒体技术期末考试

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ad if 命 封 线 密

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