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2、 n n n n?n?m m m m m m m m m m m m m m m m m m m m m).(N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 95 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 54 4 4 4 49 9 9 9 9 9 9 9e e e e e e e e e e e e e e e e e e e e e e e en n n n
3、 n n n n n n n n n n n n n nP P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P PMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM?n?r r r r r r r r r r r r r r r r r r r r r r/m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m m mi i i i i i i i i i i i i
4、i i i i i i i i i i i i i i i i i i in n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n n?(N7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 70 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 02 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 24enPMMMMMMMMMMMMMMMMMMMMMM
5、MMMMMM?2?1?00?max?=090?=090=0?2?045?045?max()2?1?2?1?3-2?3-2?1lll?ll?1bbb?bb?2?E?3-5?NF llEA?(3-6)?EA?(3-6)?(a)?p?(b)?l?l?N?E?A?1ni iiiiN llE A?(3-7)(3)?(3-8)?1-1?1-5?oab?p?e?p?e?北科大工程力学考研全套视频,真题、考点、命题规律独家视频讲解!详见:网学天地(www.e-);咨询QQ:2696670126?3-2ll?bb?E?N N N N N N NF lF F lF F F F F F F F F F F F F
6、F F F F F F F lF lF F F lF lF lF F l lF lF lF FN N N N N N N N N N NlEAEAEAEAEAEAEA A A A?l (3(3(3(3(3(3(3 3 3 3 3-6)?p?3?bc?s?s?ce?b?b?ef?1-2?E?pE?s?b?1100%lll?1100%AAA?=ssn?=bbn?,sbn n?1?NA?3-9?1-4?2.1?2.2?2.3?2.4?G?(3-10)?G?E?,?,E?G?2(1)EG?(3-11)2.5.2?北科大工程力学考研全套视频,真题、考点、命题规律独家视频讲解!详见:网学天地(www.e-
7、);咨询QQ:2696670126?=b b b b b b b b b b b b b b b b b b b b b b bbn?NA?N?3-3-3-3-3-9?4?ppTI?(3-12)?pI?maxtTW?(3-13)?ptIWR?R?2.5.3?1?3-12?3-13?2?pI?tW?3-3?3-3 432pdI?d?316tdW?44(1)32pDIa?D?d?44(1)16tDWa?daD?2.5.4?maxmaxtTW?(3-14)?maxmaxtTW?3-15?3.1.1?1zMEI?(3-16)?E?EI?Z?3.1.2?ZMyI?(3-17)北科大工程力学考研全套视频,
8、真题、考点、命题规律独家视频讲解!详见:网学天地(www.e-);咨询QQ:26966701264(132p p p p p p p p p p p p p p p p p p p p p p p?3-3?3 432p p p p p p p p p p p p p p p p p p p p p p p p p p p p p pd d d d d d d d d d d d d d d d d d d d d d d d d d d d d d dI I I I I I I I I I I I I I I I I I I I I I I?3 3 3 3 3 3 3 3 3 3 3 3 3
9、3 3 3 3 3 3 3 3 3 3 3 316t t t t t t t t t t t t td d d d d d d d d d d d d d d d d d d d d d d d dWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWt t t t t t t t t t t t t t t?D D D D D D D D D D D D D D D D D D D D D D D D DI?(1?D D D D D D D D D?d d d d d d d d d d d?W?5?M?ZI?y?maxmaxmaxmaxzzMMyIW?3-18?maxzzIWy?h
10、 b?216zWbh?D?332zWD?daD?34(1)32zWDa?3.2?maxmaxzMW?3-19?T?maxmax1ltzMyI?3-20a?maxmax2yczMyI?3-20b?,tc?12,y y?3.3?zzQSI b?3-21?Q?zS?y?zI?b?y?3.3.1?22364Qhybh?3-22?max32QA?3.3.2?9597%?2222824zQBb hHhyI b?(3-23)?dhFs1max?d?h1?北科大工程力学考研全套视频,真题、考点、命题规律独家视频讲解!详见:网学天地(www.e-);咨询QQ:2696670126?3-2020202020 0
11、0202020 0 0 020 0 02 2020 0 0 0 0 0 0 0 0 0a a a a a a a?c?2z?2 2y?3-3 3-3-3-3-3-3-3-3-3-3-3-3 3 3 3-3-3 3 3-3-3 3-3 3 3 3 3 3 3 202 2 2 2 2 2 2 b?121 1 1 1 1 1 1y y y y y y y y y y y y y y y y y y y y y y y y y y y y?3-3 3 3 3 3 21?S?y y y y y y y y y y y y y y?63.3.3?2max42483364zzddQQSQdI bAd?3-2
12、5?3.4?maxmaxmaxzzQSI b?(3-26)?maxQ?maxzS?zI?b?max?max?max?4.2?AQ?3-27?,?AQ?3-28?5.2?bsbsbsbsPA?3-29?bsA?bsbsbsAP?3-30?1?l?dxGITlP?0?(rad)(4.4)?PGITl?(rad)(4.5)?4.2?PGI?4.4?1?P?北科大工程力学考研全套视频,真题、考点、命题规律独家视频讲解!详见:网学天地(www.e-);咨询QQ:2696670126?ma?A A A A A A A A A A A A A A A A A A A A A A AQ Q Q Q Q Q Q
13、 Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q Q?,?AQ Q Q Q Q Q Q Q Q?bsbsPbA?b?7?2?l?T?G?PI?niPiiiiIGlT1?(rad)(4.6)?T?PI?,?(4.4)?2?max?maxmax?PGIT (rad/m)(4.7)?180maxmax?PGIT?m/?4.8?2?EIM?1?EIxMx?1?EIxM?4.9?CdxEIxM?4.10?DCxdxdxEIxM?4.11?C,D?3?max?max?4.12?3?lFWV?21?A?FN?EAlFlN?EAlFVN22?4.14?V?21?
14、V?4.15?4?北科大工程力学考研全套视频,真题、考点、命题规律独家视频讲解!详见:网学天地(www.e-);咨询QQ:2696670126?EIM?1?C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C Cd d d d d d d d d d d d d d d d d d d d d d d dx x x x x x x x x x x x x x x x x x x x x x x x x x x xdEI I I I I I I Ix x x x x x x x x x x x x x x
15、x x xMMMMMMMM?D D D D D D D D D D DC Cx x x x x xd d d d d d d d d d d d d dx x x x x x x x x x x x x xd d d d d d d d d d d d dx x x x x x x x x x x x x xE E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E EI I I I I I I I I I I I I I I IMMMMMMMMMMMMMMMMMM?C Cx x x x x x x x xd d d d d d
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17、?ASyzC?-2?北科大工程力学考研全套视频,真题、考点、命题规律独家视频讲解!详见:网学天地(www.e-);咨询QQ:2696670126?4.6?4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4.1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 19 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9?AyA A A A A A A A A AI I I I I I I I I I I I Ii i i i i i i i i i i i i
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