... dlJ kinh di6n v~ bai roan bie'n d':lng phing thea tieu chuin chay deo13eua yon Mises. Truy~ n ling suitt tie"p tuye"n thay d6i rhea rIa (jr tang nSigiam diin rhea r =100, 200. ... song:2utt-a uxx+Ku+AUt=f(x,t), O<x<L,t>O, (5.1.1)trong do a = .J(A + 2G)/p la v~n t6c truy~ n song dan h6i dQc cuathanh; K = Klr /F, A = Air/F, vdi r va F l~n lu'<;5tla chu vi ... cua thu~t roan Newton-Raphson trong R" so vdi trong R.4/ Khao sat slf va ch~m sinh ra Ian truy~ n song: mo phong bai roan daodQng cua thanh dan h6i vdi rang buQc dan h6i nhdt d mii-tbell....