1、AAAA0 x00( , )ttxxex( )S( )S(a)0 x00( , )ttxxex( )S( )S(b)0 x00( , )ttxxex( )S( )S(c)(1)(2)0 xtOr(t)c(t)dsesNsNsDjdsesRsDsNjdsesCjtcstrcjcjcjcjcstjcjcst)()()(121)()()(21)(21)(00dsesNsNsDjtcstrcjcjc)()()(121)(001jcjcstdsesRsDsNjtc)()()(21)(2dsesNsNsDjtcstrcjcjc)()()(121)(0010)(lim1tct)()()(00sDsNsNrc
2、lqirkkktktpitpllllteCeBebtbtlbtlbtcki21122111)cos()!2()!1()(11)()()()(100pslrclpssDsNsNb)1,2,1()()()()(!11100ljpssDsNsNdsdjbpslrcjjjl),3,2()()()()(00lqipssDsNsNBipsirci),2,1()()()()(200rkpssDsNsNCkpskrck),2,1()()()()(00rkpssDsNsNkpskrckjcjcstdsesRsDsNjtc)()()(21)(2dtrtgtc02)()()(dtrgdtrgtc)()()()()(
3、00210K02)(Kdg20K2102)()()(KKdtrgtc1)(KtrlqirkkktktpitplllljcjcstteDeAeatatlatladsesDsNjtgki2112211)cos()!2()!1()()(21)(11)()()(1psllpssDsNa)1,2,1()()()(!111ljpssDsNdsdjapsljjjl),3,2()()()(lqipssDsNAipsii),2,1()()()(2rkpssDsNDkpskk),2,1()()()(rkpssDsNkpskk02)(Kdg1011( )0nnnnD sa sa sasa 0246113572123
4、43123212311201nnnnsaaaasaaaasbbbbscccsdddseesf120311;a aa aba140521;a aa aba160731,a aa aba131 211;baabcb171 431,baabcb151 321;baabcb121 211e dd efe3201230a sa sa sa1203a aa a30221311203103saasaaa aa asasa1203a aa a2( )( )(1)(2)C sKR ss sssK 2(1)(2)Ks sss ( )R s( )C s+-432( )3320D sssssK43210133207
5、32 97sKssKsKsK0K 2 970K014 9K14 9K 432( )23610D sssss 432101312601621sssss 0) 1632)(2(234sssss021312742345sssss25 .2825 . 05 .12421241371012345sssssss0s1s2s3s45175611660s2+1=0 2s12111错啦错啦!s1,2=j32( )220D ssss 2220s 322101122220402sssss辅助方程辅助方程求导后的系数s=j 1C(s)R(s)2(2nnsssK121223122)()(nnnnKsssKss02)(2
6、1223nnnKssssD0750075006 .34)(123KssssD1011123750006 .34750075006 .3475006 .3475001KsKsKss6 .3401 K07500) 1(7500) 1(6 .34) 1(112131Ksss0)4 .74667500(8 .74336 .31112131Ksss4 .7466750006 .31)4 .74667500(8 .74336 .314 .746675006 .318 .7433110111112131KsKsKss3 .3211 K1011( )0nnnnD sa sa sasa1032105432176
7、54398745000000000nnaaaaaaaaaaaaaaaaaaaaaa110a 102320aaaa 10332154300;aaaaaaaa 0n 320123( )0D sa sa sa sa110a 1021203320aaa aa aaa 1033213120330()000aaaaaa a aa aa 01230, 0, 0, 0aaaa1 2030a aa a320123( )0D sa sa sa sa30221311203103saasaaa aa asasa43201234( )0D sa sa sa sa sa110a 1021203320aaa aa aaa
8、10233213120314430()00aaaaaa a aa aa aaa 1032102443120314432400()00000aaaaaaaa a aa aa aaaaa 012340, 0, 0, 0, 0aaaaa12030a aa a23120314()0a a aa aa a402431321 203412131 203141 203040()saaasaaa aa asaaa a aa aa asa aa asaKsssKsRsC) 1)(1)(1()()(32101)()()(32123132213321KssssD12030a aa a321321111)(1K1111)(321321cK3221133123122cK011213212321cK011223221312cK011232231213cK0)(3221320)(3122310)(21232132102222cK8mincK
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