文档介绍
18Zhang ShihuiZhang Shihui18.1Zhang Shihui18.1Zhang ShihuifBfqv=×BθfqvBsinθqvqvB×FqE=+qv×Bf⊥v18.1Zhang ShihuiqvB××××RmvBfqvBqB××Fm××2πm××××T××××qBv××××q,mZhang Shihui2πmTqBRmvqBErnestO.LawrenceErnestO.LawrenceZhang Shihuiv⊥vsinθ,vvcosθRmv⊥T2πmqBqBdvTθvvcosθ≈vθBvv||||dZhang Shihui18.2Zhang ShihuiqEqvBBUEhvBhHInqvSnhbqvFImUvHqhnhbqIEFve1IBIBUHHbnqbbH1nq·PNZhang ShihuiPNPNBBFFmmUUHHvvIIUH>0UH<018.2Zhang ShihuiZhang ShihuiIfqv×BIdlBnnSdlvdF(nSdl)ffdFnSqdlv=×BnSqvdl×BdlBqdFIdl=×BSvdlF∫LIdl=×BIqn⋅Sv1Zhang ShihuiFIl=×B,FIlBsinθabIbBFIdl×B∫adlBθbFI(∫dl)×BaLbab∫adlL⇒FIL=×B,FILBsin=θL0=⇒F02Zhang ShihuiNBαzdFdFBαBαIdlRF∫dFsinα2πRN∫IBsinα⋅dlo2πRIBsinαZhang ShihuiF1daFF′Oad,cb11l1IBab,cd′O′F=−FIlB221lc2OO'b′Fl12IllBsinθM2FsinθISBsinθF21222d(c)abcdIadˆlnbc2Bθa(b)ˆMIS=×BpmISnpm()F′2Zhang Shihu