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r=15;E=20000;v=0.25;z=40;C=56;D=32.32;q=-0.45;%基本量
R4=@(w,d)sqrt((r-d*cos(w))^2+(d*sin(w))^2+z^2);%%代入下式直接计算还是有问题
fun1=@(w,d)(1+v)/(2*pi*E*R4)*(r*z/R4^2-(1-2*v)*r/(R4+z))*q%被积函数
Sr2=quad2d(fun1,-0.5*pi,0.5*pi,0,100)
fun2=@(w,d)(1+v)/(2*pi*E*R4)*(2*(1-v)+z^2/R4^2)*q%被积函数
Sz2=quad2d(fun2,-0.5*pi,0.5*pi,0,100)
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