MATLAB 可以求解三个联立方程吗？

jsp613

不会maple
我把源程序贴上来你帮我运行一下看看结果行吗？

syms r11 r22 r33 r44 r P2;
lamga=1;
r1=9.5*10^(-3);r2=9.6*10^(-3);
r3=11.5*10^(-3);r4=11.6*10^(-3)；P4=600;
C10=115100;C01=101300；P0=1.01325*10^5;h1=0.003;%h1是铜块的厚度
n=1000;
w=2*pi*n/60;
midu=8920;
r11=(r22^2-(r2^2-r1^2)/lamga)^(1/2);
R1=(r1^2+(r^2-r11^2)/lamga)^(1/2);%R1是内囊变形过程的外径的动态变量
t1=(2/r)*((R1^2/(lamga^2*r^2)-r^2/R1^2)*C10-((lamga^2*r^2)/R1^2-R1^2/r^2)*C01);
jifen1=int(t1,r,r11,r22);
jifenjg1=subs(jifen1);
P1=midu*w.^2*(r11.^3-(r11-h1).^3)/(3*r11);
result1=jifenjg1+P0+P1-P2;
%------------------------------------------------------------------------
r33=(r44^2-(r4^2-r3^2)/lamga)^(1/2);
R2=(r3^2+(r^2-r33^2)/lamga)^(1/2);%R2是外囊变形过程的外径的动态变量
t2=(2/r)*((R2^2/(lamga^2*r^2)-r^2/R2^2)*C10-((lamga^2*r^2)/R2^2-R2^2/r^2)*C01);%t=(trr-ttheta)/2;%t=2*(R1^2/(lamga^2*r^2)-r^2/R1^2)*(C10+C01)/r;%t=(trr-ttheta)/2
jifen2=int(t2,r,r33,r44);
jifenjg2=subs(jifen2);
P3=1.0*10^3*w.^2*(r33.^3-r22.^3)/(3*r33);
result2=jifenjg2+(P2+P3)-P4;
%result3=(r3^2-r2^2)-(r33^2-r22^2);
%result3=(r3^2-r2^2)-(r44^2-(r4^2-r3^2)/lamga-r22^2)
s1=((r11-r1)/sqrt(2)+r1)*(r11-r1)/sqrt(2)*2-asin((r11-r1)/sqrt(2)/r1)*r1.^2;
s2=pi/4*r1^2-((pi/4-asin((r11-r1)/sqrt(2)/r1))*r1^2-(r11-r1)*r1*sin(pi/4-asin((r11-r1)/sqrt(2)/r1)));
result3=4*(s1+s2)-pi*(r33^2-r3^2);
%------------------------------------------------------------------------
[r22,r44,P2]=solve('result1=0','result2=0','result3=0');
r22
r44
P2

[ 本帖最后由 ChaChing 于 2010-7-25 01:30 编辑 ]