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[求助]
傳遞函數的求解方程怎么弄?
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syms s l=0.1; b=0.020; h1=0.008; h2=0.005; h3=0.003; ro1=7800; ro2=2600; ro3=7800; E1=2.06e11; E3=2.06e11; G2=9.8e9*(1+0.1i); c=1+(h1+h3)/(2*h2); I1=b*h1^3/12; I3=b*h3^3/12; D=E1*I1+E3*I3; A1=b*h1; A2=b*h2; A3=b*h3; m=ro1*A1+ro2*A2+ro2*A2; K=E1*A1*E3*A3/(E1*A1+E3*A3); Y=K*c^2/D; g=(G2*A2)/(K*h2^2); F=[0,1,0,0,0,0;0,0,1,0,0,0;0,0,0,1,0,0;0,0,0,0,1,0;0,0,0,0,0,g;m*s^2/D,0,-m*s^2/(g*D),0,(1+Y),0]; M=[1,0,0,0,0,0;0,1,0,0,0,0;0,m*s^2/(g*D),0,-Y/g,0,1/g;0,0,0,0,0,0;0,0,0,0,0,0;0,0,0,0,0,0]; N=[0,0,0,0,0,0;0,0,0,0,0,0;0,0,0,0,0,0;0,m*s^2/g,0,-D*(1+Y),0,D;m*s^2/g,0,-D*(1+Y),0,D/g,0;m*s^2/g,0,-D*Y,0,D/g,0]; efs=expm(F); si=det(M+N*efs); solve(si,s) 這樣可以求解S么?我試過,計算機直接死機,請問有什么更好的解非線性方程的? |
木蟲 (著名寫手)
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