第九章压杆稳定51206

1、 maxnmaxaf crff crff crff mmwbxylfb)(xfw fwxm )(fwxmeiw )( （a)eifk 2(b)式的通解为式的通解为)c (cossinkxbkxaw ）02 wkw(b)b0, 0 wx0, wlx000cos0sin bba0 0 klasin0 0 a0sin kl0 00 0 wa,mmwbxylf), 2 , 1 , 0(0sin nnklkl), 2 , 1 , 0(2 nnkleifk), 2 , 1 , 0(222 nleinf2cr2eifl . kl sinwakxmmwbxylfsinxwal作业：习题作业：习题9-2/4/9

2、 of lfcr2l()2cr22eifl fcrl0.3l0.7l( . )2cr207eifl fcrl2cr2eifl l 22cr)(leif lfcrl/4l/4l/2( / )2cr22eifl l 22crleif 22cr)7 . 0(leif 22cr)5 . 0(leif 22cr)2(leif 22cr)(leif 22cr)(leif zyxx8801000yzyxz880fflxz880 x8801000yzykn6 .134)11(105 . 6101 . 214. 3)(2811222cr leif x8801000yzykn4 .406)88. 05 . 0(1

3、08 . 3101 . 214. 3)(2811222cr leif fflxz880 aleiaf22crcr)( ()()(/ )2222crcr222feieeialall iil aii 22cr e crcraf 2crp2 e 1pe 2p e 916p206 10100200 10e scr ba 12 bas bas 2 21 12 22cr)(leif ba crscr 2 scr ba cr22cr e cr psil df1.3 a bf1.6 acafaal22 al3 . 11 aal12. 16 . 17 . 07 . 0 df1.3 a bf1.6 acafa30

4、mm20mmyz1p99e m0058. 002. 003. 0)02. 003. 0(1213 aiiyym0087. 0 aiizz15 . 0 zy 30mm20mmyz11586 zzzyyyilil kn5 .8922crcr zeaaf 1p100e 222244414)(64)(ddddddaii 1004122 ddlilm6 . 11404. 005. 010022min lm2 . 143min ll122754 ddlil 5712. 1240304s2bakn5 .155)(4)(22crcr ddbaaf stcrnff stcrnffn 1p86e 4daii 15 .62 il 2 .43s2bampa301cr bampa478crcr af.stcrnffn 5 51111pd活塞杆活塞杆活塞活塞dn398042 pdfn23900stcr fnfaii il pd活塞杆活塞杆活塞活塞d24222cr)(64)(ldeleif 2004 dlil 97p1 e abcf0.60.30.80 cm0 06 60 09 90 0 .sin.n ff8 . 06 . 08 . 0sin22 ff27272 2.n 1p99e 4daii abcf0.60.30.8180 ils257ab 12 mpa214c