how to find mode shape and natural frequency from the below script.

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Prateek Srivastava 2017-5-26

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https://ww2.mathworks.cn/matlabcentral/answers/342129-how-to-find-mode-shape-and-natural-frequency-from-the-below-script

评论： KSSV 2017-5-27

f1=m1(:,1); r1=m1(:,2); i1=m1(:,3); mag1=sqrt(r1.^2+i1.^2); 
subplot(3, 3, 1);
plot(f1,mag1); 
f2=m2(:,1); r2=m2(:,2); i2=m2(:,3); abs2=sqrt(r2.^2+i2.^2); 
subplot(3, 3, 2);
plot(f2,abs2);
f3=m3(:,1); r3=m3(:,2); i3=m3(:,3); abs3=sqrt(r3.^2+i3.^2); 
subplot(3, 3, 3);
plot(f3,abs3);
f4=m4(:,1); r4=m4(:,2); i4=m4(:,3); abs4=sqrt(r4.^2+i4.^2); 
subplot(3, 3, 4);
plot(f4,abs4);
f5=m5(:,1); r5=m5(:,2); i5=m5(:,3); abs5=sqrt(r5.^2+i5.^2); 
subplot(3, 3, 5);
plot(f5,abs5);
f6=m6(:,1); r6=m6(:,2); i6=m6(:,3); abs6=sqrt(r6.^2+i6.^2); 
subplot(3, 3, 6);
plot(f6,abs6);
f7=m7(:,1); r7=m7(:,2); i7=m7(:,3); abs7=sqrt(r7.^2+i7.^2); 
subplot(3, 3, 7);
plot(f7,abs7);

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John D'Errico 2017-5-26

What do mode shape and natural frequency have to do with anything? We don't have your data, nor can see the figures that you plotted. So how can anyone else hazard a guess what to do from something that nobody but you can see?