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syms k1 k2 k3 k4 k5 k6 m1 m2 m3 m4 m5 x;
K=[k1+k2 -k2 0 0 0;-k2 k2+k3 -k3 0 0;0 -k3 k3+k4 -k4 0;0 0 -k4 k4+k5 -k5;0 0 0 -k5 k5];    %ÕûÌå¸Õ¶È¾ØÕó
m=[m1 m2 m3 m4 m5];            
M=diag(m);                 %ÕûÌåÖÊÁ¿¾ØÕó

B=K-x*M;         %ÌØÕ÷¾ØÕó
B_det=det(B);          %ÌØÕ÷¾ØÕóµÄÐÐÁÐʽ

k=load('rand_stiff.dat');
m=load('rand_mass.dat');

fid=fopen('eigenvalue.dat','wt');
j=1
% for j=1:1:30
   B_det1=subs(B_det,{k1,k2,k3,k4,k5,m1,m2,m3,m4,m5},[k(1,j),k(2,j),k(3,j),k(4,j),1200,m(1,j),m(2,j),m(3,j),m(4,j),17]);     %¸³Öµ
   S=sort(solve(B_det1,'x'))'                %Çó½âÌØÕ÷Öµ²¢½øÐÐÅÅÁÐ
   S_1=str2num('S');
%    save('eigenvalue.dat','S')
   fprintf(fid,'%8.4f',S_1);
   fprintf(fid,'\n');
% end
fclose(fid);
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