另外壹個問題(編號552432080810073652)也是妳問的吧?
參考代碼:
for?i0?=?5.83?+?linspace(-0.5,0.5,10)n=600:1:4000;
Ttq=-19.313+295.27*n/1000-165.44*(n/1000).^2+40.87*(n/1000).^3-3.8445*(n/1000).^4;
io=5.83;
t=0.844;
r=0.367;
ig2=2.769;
ig3=1.644;
ig4=1.00;
ua2=0.377*r*n/(ig2*i0);
ua3=0.377*r*n/(ig3*i0);
ua4=0.377*r*n/(ig4*i0);
Ft2=Ttq*ig2*i0*t/r;
Ft3=Ttq*ig3*i0*t/r;
Ft4=Ttq*ig4*i0*t/r;
m=3880;
f=0.012;
g=9.8;
CdA=2.77;
Ff2=m*g*f;
Fw2=CdA*ua2.^2/21.15;
Fr2=Ff2+Fw2;
F2=Ft2-Fr2;
a2=m./F2;
Ff3=m*g*f;
Fw3=CdA*ua3.^2/21.15;
Fr3=Ff3+Fw3;
F3=Ft3-Fr3;
a3=m./F3;
Ff4=m*g*f;
Fw4=CdA*ua4.^2/21.15;
Fr4=Ff4+Fw4;
F4=Ft4-Fr4;
a4=m./F4;
m2=5.142415:0.001:34.282777;
m3=34.28277:0.001:57.74269;
m4=57.7427:0.001:70;
t2=interp1(ua2,a2,m2,'spline');
t3=interp1(ua3,a3,m3,'spline');
t4=interp1(ua4,a4,m4,'spline');
plot(m2,t2,m3,t3,m4,t4);
hold?on;
%面積
A=0.001*sum(t2-0)+0.001*sum(t3-0)+0.001*sum(t4-0);
T=86.8332/3.6;
end
其中i0在5.83的基礎上加壹個數,現在取的值是 linspace(-0.5,0.5,10),也就是在-0.5到0.5之間取10個點,妳可以根據自己的需要改。