濮良贵《机械设计》（第10版）考研资料精讲！
<div class="article-content uc-nf-fontsize-change-dom simple-ui"> <p class="ne-p"><strong><span class="ne-text">濮良贵机械设计（第10版）考研资料精讲</span></strong><strong><span class="ne-text">！</span></strong></p><p class="ne-p"><strong><span class="ne-text">资料全称：</span></strong><strong><span class="ne-text">濮良贵《机械设计》（第10版）全套资料【笔记＋题库＋视频】</span></strong></p><p class="ne-p"><strong><span class="ne-text">濮良贵机械设计（第10版）考研资料精讲</span></strong><strong><span class="ne-text">部分摘录：</span></strong></p><p class="ne-p"><strong><span class="ne-text">选择题</span></strong></p><p class="ne-p"><strong><span class="ne-text">1对于受循环变应力作用的零件，影响疲劳破坏的主要因素是（）</span></strong></p><p class="ne-p"><span class="ne-text">A.最大应力</span></p><p class="ne-p"><span class="ne-text">B.平均应力</span></p><p class="ne-p"><span class="ne-text">C.应力幅</span></p><p class="ne-p"><span class="ne-text">D.循环特性</span></p><p class="ne-p"><span class="ne-text">【答案】C</span></p><p class="ne-p"><span class="ne-text">【解析】对于受循环变应力作用的零件，最小应力不变的情况下，应力幅越小，零件的疲劳强度越高。</span></p><p class="ne-p"><strong><span class="ne-text">2零件的形状、尺寸、结构相同时，磨削加工的零件与精车加工相比，其疲劳强度（）。</span></strong></p><p class="ne-p"><span class="ne-text">A.增高</span></p><p class="ne-p"><span class="ne-text">B.不变</span></p><p class="ne-p"><span class="ne-text">C.降低</span></p><p class="ne-p"><span class="ne-text">D.可能增高也可能降低</span></p><p class="ne-p"><span class="ne-text">【答案】A</span></p><p class="ne-p"><span class="ne-text">【解析】改善零件的表面质量是提高机械零件的疲劳强度的一种有效措施。磨削加工所形成的零件表面比精加工的零件表面质量高，疲劳强度高。</span></p><p class="ne-p imgbox"><span class="image-box"><img data-original="http://image.uc.cn/s/wemedia/s/upload/2022/7f7b610570946d99dc75ac59d840c3aa.png" src="http://image.uc.cn/o/wemedia/s/upload/2022/7f7b610570946d99dc75ac59d840c3aa.png;,4,png;3,700x.png" uploaded="1" data-infoed="1" data-width="899" data-height="561" data-format="png" data-size="575475000" data-index="0" class="image-loaded" style="width: 700px !important; height: 436.819px !important;" heavypress="http://image.uc.cn/o/wemedia/s/upload/2022/7f7b610570946d99dc75ac59d840c3aa.png;,4,png;3,700x.png"><span class="share-import-title"></span></span></p><p class="imgbox_desc"><span>濮良贵《机械设计》（第10版）考研资料精讲</span></p><p class="ne-p"><strong><span class="ne-text">3在进行疲劳强度计算时，其极限应力应为材料的（）。</span></strong></p><p class="ne-p"><span class="ne-text">A.屈服点</span></p><p class="ne-p"><span class="ne-text">B.疲劳极限</span></p><p class="ne-p"><span class="ne-text">C.强度极限</span></p><p class="ne-p"><span class="ne-text">D.弹性极限</span></p><p class="ne-p"><span class="ne-text">【答案】B</span></p><p class="ne-p"><span class="ne-text">【解析】疲劳强度计算时应选择材料的疲劳极限作为极限应力。</span></p><p class="ne-p"><strong><span class="ne-text">4（）的键槽对轴强度的削弱最大。</span></strong></p><p class="ne-p"><span class="ne-text">A.平键</span></p><p class="ne-p"><span class="ne-text">B.半圆键</span></p><p class="ne-p"><span class="ne-text">C.楔键</span></p><p class="ne-p"><span class="ne-text">D.花键</span></p><p class="ne-p"><span class="ne-text">【答案】B</span></p><p class="ne-p"><span class="ne-text">【解析】半圆键能在轴槽中摆动以适应毅槽底面，装配方便，缺点是键槽对轴的削弱大，只适用于轻载连接。花键因槽较浅，齿根处应力集中较小，轴与毂的强度削弱较少。</span></p><p class="ne-p"><strong><span class="ne-text">5普通平键的工作面是（）。</span></strong></p><p class="ne-p"><span class="ne-text">A.顶面</span></p><p class="ne-p"><span class="ne-text">B.底面</span></p><p class="ne-p"><span class="ne-text">C.侧面</span></p><p class="ne-p"><span class="ne-text">D.端面</span></p><p class="ne-p"><span class="ne-text">【答案】C</span></p><p class="ne-p"><span class="ne-text">【解析】平键的两侧面是工作面，工作时，靠键与轴槽、毂槽的侧面的挤压传递转矩。键的上表面和轮毂的键槽底面间则留有间隙。</span></p><p class="ne-p"><strong><span class="ne-text">6国链条的节数宜采用（）。</span></strong></p><p class="ne-p"><span class="ne-text">A.奇数</span></p><p class="ne-p"><span class="ne-text">B.偶数</span></p><p class="ne-p"><span class="ne-text">C.奇数的整倍数</span></p><p class="ne-p"><span class="ne-text">D.以上三种均可以</span></p><p class="ne-p"><span class="ne-text">【答案】B</span></p><p class="ne-p"><span class="ne-text">【解析】链节数最好取为偶数，以便链条连成环形时正好是外链板与内链板相接，接头处可用开口销或弹簧夹锁紧。若链节数为奇数时，则需采用过渡链节，在链条受拉力时，过渡链节还要承受附加的弯曲载荷，通常应避免采用。</span></p><p class="ne-p imgbox"><span class="image-box"><img data-original="http://image.uc.cn/s/wemedia/s/upload/2022/5fc42b608fe98c5a27e2c3e77dfd673c.png" data-src="http://image.uc.cn/o/wemedia/s/upload/2022/5fc42b608fe98c5a27e2c3e77dfd673c.png;,4,png;3,700x.png" src="//image.uc.cn/s/uae/g/1v/images/image-lazyload.png" uploaded="1" data-infoed="1" data-width="873" data-height="529" data-format="png" data-size="639418000" data-index="1" class="image-default-bg b-lazy" heavypress="http://image.uc.cn/o/wemedia/s/upload/2022/5fc42b608fe98c5a27e2c3e77dfd673c.png;,4,png;3,700x.png" style="width: 700px !important; height: 424.17px !important;"><span class="share-import-title"></span></span></p><p class="imgbox_desc"><span>濮良贵《机械设计》（第10版）考研资料精讲</span></p><p class="ne-p"><strong><span class="ne-text">7链传动的大链轮齿数不宜过多的原因是（）。</span></strong></p><p class="ne-p"><span class="ne-text">A.为减小速度波动</span></p><p class="ne-p"><span class="ne-text">B.为避免传动比过大</span></p><p class="ne-p"><span class="ne-text">C.避免磨损导致过早掉链</span></p><p class="ne-p"><span class="ne-text">D.避免附加弯矩</span></p><p class="ne-p"><span class="ne-text">【答案】C</span></p><p class="ne-p"><span class="ne-text">【解析】大链轮的齿数过多，链轮上一个链节所对的圆心角就越小，较链所在的直径的增加量越大，较链会更接近齿顶，从而增大了脱链和跳链的机会。</span></p><p class="ne-p"><strong><span class="ne-text">8链传动中，链节数取偶数，链轮齿数取奇数，最好互为质数，其原因是（）。</span></strong></p><p class="ne-p"><span class="ne-text">A.链条与链轮轮齿磨损均匀</span></p><p class="ne-p"><span class="ne-text">B.工作平稳</span></p><p class="ne-p"><span class="ne-text">C.避免采用过渡链节</span></p><p class="ne-p"><span class="ne-text">D.具有抗冲击力</span></p><p class="ne-p"><span class="ne-text">【答案】A</span></p><p class="ne-p"><span class="ne-text">【解析】链节数为偶数，是为了避免使用过渡链节，过渡链节的链板要受附加弯矩的作用，应该尽量避免。齿数为奇数，并且互质，可以减少同一齿与同一链节的咬合次数，降低磨损，使链条磨损均匀，故选A项。</span></p><p class="ne-p"><strong><span class="ne-text">......</span></strong></p><p class="ne-p"><strong><span class="ne-text">>>>本文为节选>>>相关资料均载于攻关学习网>>>每年更新！</span></strong></p></div><br>最后别忘了到沪学网下载免费课程！
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