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기타 | 임펄스 입력에 대한 응답 구하기 |

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작성자 cemtool 작성일14-08-20 10:59 조회5,566회 댓글1건

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파일 VTB3_1.cem을 이용해서, 질량 m=100kg, 감쇠 c=2.1kg/s, 강성 k=2100N/m의 시스템이 시간 t=0에서 크기 10 N.s 의 임펄스를 받았을 때의 응답을 구하여라.
ex3_1.cem
% This file is a solution file of TB 3.1 
m = 10;      // Mass //
c = 2.1;     // Damping coefficient //
k = 2100    // Stiffness //
F0 = 10;    // Magnitude of impulse //
tf = 30;     //  Total time of the response //
flag = 1;   
 
vtb3_1(m,c,k,F0,tf,flag)
vtb3_1.cem
function 
x <> m,c,k,Fo,tf,flag 
%VTB3_1 Impulse response of a SDOF system.				 %VTB3_1(m,c,k,Fo,tf,1) plots the response of the system to an% impulse of magnitude Fo.  The input variables are the mass m,% the stiffness k, and the damping c.  The total time of the % response is tf.% VTB3_1(m,zeta,w,Fo,tf,2) plots the response of the system % described by the mass m, the damping ratio zeta, and the % undamped natural frequency w.  
clear 
if (flag == 1)  {    num=Fo;
    den=[m c k];
   }   else   {     zeta=c;
     w=k;
     num=Fo/m;
     den=[1 2*zeta*w w^2];
    } 
t=0:tf:tf/200;
 
x=step([num 0],den,t);
 
plot(t,x)title("Impulse Response of the SDOF damped oscillator")ytitle("Displacement x(t)")xtitle("time  (sec)")

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