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vibration.m
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vibration.m
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%????????
syms m p E I N A mf Ui Ca Cb ma Uo
ma=input('')
mf=input('???????')
%???????
Me=m/420*[156*p 22*p^2 54*p -13*p^2;...
22*p^2 4*p^3 13*p^2 -3*p^3;...
54*p 13*p^2 156*p -22*p^2;
-13*p^2 -3*p^3 -22*p^2 4*p^3];
% ?????? a
Kea=E*I/p^3*[12 6*p -12 6*p;...
6*p 4*p^2 -6*p 2*p^2; ...
-12 -6*p 12 -6*p;...
6*p 2*p^2 -6*p 4*p^2];
% ?????? b
Keb=(N*A-mf*Ui^2)*...
[6/5*p 1/10 -6/5*p 1/10;...
1/10 2*p/15 -1/10 -1/30;...
-6/5*p -1/10 6/5*p -1/10;...
1/10 -1/30 -1/10 2*p/15];
%????????? a
Ca=c/420*[156*p 22*p^2 54*p -13*p^2;...
22*p^2 4*p^3 13*p^2 -3*p^3;...
54*p 13*p^2 156*p -22*p^2;
-13*p^2 -3*p^3 -22*p^2 4*p^3];
%????????? b ??????
Cb=-(2*mf*Ui + ma*Uo)*[
-1/2 -p/10 -1/2 p/10;
p/10 0 -p/10 p^2/60;
1/2 p/10 1/2 -p/10;
-p/10 -p^2/60 p/10 0];