【正文】 ll be traveling fast, so despite the distance, it will not be like diving into the deep end of a pool. It will be like he is diving into the shallow end. Skydiver preps for the big jump When he jumps, he is expected to reach the speed of sound 690 mph (1,110 kph) in less than 40 seconds. Like hitting the top of the water, he will begin to slow as he 遼寧科技大學(xué)課程設(shè)計 27 approaches the more dense air closer to Earth. But this will not be enough to stop him pletely. If he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. His team hopes it39。 Have declared the end of the encounter that haven39。那些曾經(jīng)所謂的非做不可，只是青蔥年華里自己給自己注射的一支強(qiáng)心劑，或者說，是自以為是的精神寄托罷了。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm injection, or is a selfrighteous spiritual. 一個人的時候，自己的想法總是特別地清晰。t want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, later again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can39。 The end of our life, and can meet many things really do? 而窮盡我們的一生，又能遇到多少事情是真正地非做不可？ During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。 May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life trajectory deeply shallow, suddenly feel something, do it. 一字開頭的年齡已經(jīng)到了尾聲。s 21 win. Michel Platini, president of European football39。s antiracism taskforce, is in London for the Football Association39。t agree with the disciplinary action your employer has taken against you ? your employer dismisses you and you think that you have been dismissed unfairly. For more information about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。 在課程設(shè)計過程中，我通過查閱很多書本和網(wǎng)上資料，并經(jīng)常 與同學(xué)探討所遇到的問題，把課堂上所學(xué)到的理論知識與實際的設(shè)計工作相結(jié)合，使得這些知識得到了鞏固加深，而且提高了我的自學(xué)能力和團(tuán)隊協(xié)作能力。校核如下： )1a r c c o s ( Dh???? 已知 mmD 600? ， ?f ， mmh ?? ，所以： ???? ) rc c os (? 遼寧科技大學(xué)課程設(shè)計 21 而 ?tan?f ，得到： ???? r c t a na r c t a n f? 由于 ????? 0 ?? ，因此，第一架軋機(jī)可以實現(xiàn)帶鋼順利咬入。 根據(jù)以上結(jié)果，軋輥各部分均滿足強(qiáng)度要求。 遼寧科技大學(xué)課程設(shè)計 17 工作輥強(qiáng)度校核 （ 1）工作輥輥身強(qiáng)度校核 圖 42 工作輥彎矩圖 遼寧科技大學(xué)課程設(shè)計 18 工作輥輥身中心處承受的垂直彎矩為 ? ?合要求所以工作輥輥身強(qiáng)度符輥身合成張力矩水平張力作用彎矩前后總張力差M P aWmKNMMMmKNBLTMKTmKNBLPMggggsgggg2404 Mp . 1 . 918429 7 . 7842N9 7 . 84843gg22222121??????????????????????????????????????????????????????????? （ 2）工作輥輥頭強(qiáng)度校核 利用前滑值計算軋輥的轉(zhuǎn)速 D A 圖 43 工作輥輥頭圖 ????? KnPM n ? ?? ?? ??? ????????????????9 5 Mp 5901060015~5311nnnngWMWDammDD 因此，工作輥輥頭強(qiáng)度滿足要求。 表 41 軋輥材質(zhì)及許用應(yīng)力值 材質(zhì) 許用應(yīng)力??? /MPa 許 用 接 觸 應(yīng) 力???? /MPa 許用剪切應(yīng)力 /MPa 許用接觸剪應(yīng)力 ???? /MPa 合金鍛鋼 240 2400 73 730 軋輥各部分尺寸分別為： 工作輥：輥身直徑 gD =600mm，輥身長度 sL =1700mm； 工作輥輥頸直徑： ( 5 ) 5 60 0 33 0ggd D m m? ? ? ?； 工作輥輥頸長度： ( 0. 83 1. 0) 0. 9 33 0 29 7ggl d m m? ? ? ?； 工作輥壓下螺絲間的中心距： 199722972297170022g ??????? gg llLL mm； 支撐輥：輥身直徑 zD =1500mm，輥身長度 sL =1700mm ； 支撐輥輥頸直徑 : ( ) 150 0 825zzd D m m? ? ? ?； 支撐輥輥頸長度： ( 3 ) 825 743zzl d m m? ? ? ?； 支撐輥壓下螺絲間的中心距： zL =2443mm。 表