Matlab_MDOF_Note_Part_1 - Matlab MDOF Notes Part 1 B.P....

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Matlab MDOF Notes Part 1 B.P. Wang, MAE UTA, March 25,2010 Matlab_MDOF_Note_Part_1.m codes in D:\2010\Matlab-MDOF\MDOF-2010 word files Matlab_MDOF_Note_Part_1.doc  : this document Note-B-Matlab_2dof_Examples.doc  : results of 2-dof examples        Generated by : Matlab_2dof_Examples.doc     Note_c.doc    : results of 2-dof examples ( use automated functions)         Generated by Note_c.m Note-A-Matlab_Text_Examples_A.doc : results of aexamples in Ch 9 to 11 of Craig’s book   Generated by : Matlab_Text_Examples_A m-files m-file for Examples  Matlab_Text_Examples_A.m : Generates results in Note-A  Matlab_2dof_Examples.m  : Generates results in Note-B        uses the following files for ODE45 solutions            TWODOF_1.m            TWODOF_1_Damped.m  (IC)            TWODOF_2_Damped.m  (Step)  Note_C.m                 : generate results in Note-C Other examples:  MK_Mode_Superposition_Test.m Examples for pulse type excitation:  MK_Mode_Superposition_Pulse_Fun_Test.m Forcing functions m-files    ZeroF.m      % zero    StepF.m      % step    SineF.m      % sine    SineF_Pulse.m                         SineF_Res.m    SineF_Res1.m    SineF_Res_Pulse.m    StepF_Pulse.m    SineF.m
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dir p-codes p-codes not found. 2-dof symbolic solution help TWOdof_dsolve  function [U,TTT]=TWOdof_dsolve(K,M,u0,v0,Ft,IOPT): solution by dsolve  % Purpose : Solution of undamped 2-dof system by dsolve    with automated generation of Matlab command for   the solution of  undamped 2-dof system by dsolve     Usage:      U=TWOdof_dsolve(K,M,u0,v0,Ft)   Input:      K= stiffness matrix      M= mass matrix      u0= initial displacements      v0= initial velocities      Ft = symbolic forcing function vector, e.g., Ft=[sin(t);2*t]           for constant or zero, use  Ft=sym([10;0]) etc      IOPT=print option          =0, do not print description of the solutions          =1, print description of the solutions   Output   U = Structural array contains the following       u1: [1x1 sym]       u2: [1x1 sym]     Note that use the following commands to get the solutions       U1=U.u1;       U2=U.u2;  Note that U1,U2 are symboloc solution, contains t a the time variable   TTT = Matlab dsolve command  % B.P.Wang, march 6,2010 Eigensolutions by eig help eigSORT   Usage :      [Phi,Eg]=eigSORT(K,M)   Input:     M = mass matrix     K = stiffness mstrix   Output:     Phi = maxx-normalized modal matrix         i.e', Phi.'*M*Phi=I
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This note was uploaded on 04/16/2010 for the course MAE 3316 taught by Professor Dr.wang during the Spring '10 term at University of Texas at Austin.

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Matlab_MDOF_Note_Part_1 - Matlab MDOF Notes Part 1 B.P....

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