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tyutzxy金蟲 (小有名氣)
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[求助]
"小蟲求助“ 未定義函數(shù)或變量 'Beam_InputData547'。 已有1人參與
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小蟲剛學(xué)習(xí)MATLAB，現(xiàn)正在學(xué)習(xí)《Matlab有限元結(jié)構(gòu)動(dòng)力學(xué)分析與工程應(yīng)用》，在5.4.3瞬態(tài)問題分析。例5.7中按照書本附帶的源程序運(yùn)行提示 未定義函數(shù)或變量 'Beam_InputData547'。 出錯(cuò) EX547 (line 28) Beam_InputData547; % import the input data for the information of 代碼開頭部分如下： %-------------------------------------------------------------------------% % Example 5.4.7 % To solve transient response of a 2-d frame structure. % The solution methods are: 1) central difference scheme. 3) Houbolt integration scheme. % 4) Wilson ?? integration scheme. 5) Newmark integration scheme % nodal dof: {u1 v1 w1 x1 y1 z1 u2 v2 w2 x2 y2 z2} % Problem description % Find the response of a frame structure which is made of three beams of lengths of 4 m, % 3 m and 4 m, respectively. All beams have cross- section of 0.10 m height by 0.05 m % width. The elastic modulus is 2.10x10^11 Pa. The frame is subjected to an impulse load % of amplitude 500 N in the middle of the top beam. One end of the each vertical beam is % fixed. (see Fig. 5-9 for the element discretization) % Variable descriptions % k, m - element stiffness matrix and mass matrix % kk, mm - system stiffness matrix and mass matrix % ff - system force vector % index - a vector containing system dofs associated with each element % bcdof - a vector containing dofs associated with boundary conditions % bcval - a vector containing boundary condition values associated with the dofs in 'bcdof' % dsp - displacement matrix % vel - velocity matrix % acc - acceleartion matrix %-------------------------------------------------------------------------- % (0) input control data %-------------------------------------------------------------------------- clear; clc; Beam_InputData547; % import the input data for the information of % nodes, elements, loads, constraints and materials Opt_beam=1; % option for type of the beam % =1 Euler Bernoulli beam % =2 Timoshenko beam Opt_mass=2; % option for mass matrix % =1 consistent mass matrix % =2 lumped mass matrix Opt_section=1; % option for type of cross-section % = 1 rectangular cross-section % = 2 circular cross-section TypeMethod=1; % option for selecting the solution method % = 1 central difference scheme % = 3 Houbolt integration scheme % = 4 Wilson integration scheme % = 5 Newmark integration scheme Typeload=1; % option for selecting the load type % = 1 impulse load % = 2 step load % = 3 Harmonic load dt=0.00001; % time step size ti=0; % initial time tf=0.200; % final time nt=fix((tf-ti)/dt); % number of time steps tt=ti:dt:ti+nt*dt; % generate time samples vector ac=0.00002; bc=0.00008; % Parameters for proportional damping al=0; % angle between the reference coordinate system and % the local coordinate system for the space element %-------------------------------------------------------------------------- % (1) initialization of matrices and vectors to zero %-------------------------------------------------------------------------- k=zeros(No_nel*No_dof,No_nel*No_dof); % element stiffness matrix m=zeros(No_nel*No_dof,No_nel*No_dof); % element mass matrix kk=zeros(Sys_dof,Sys_dof); % initialization of system stiffness matrix mm=zeros(Sys_dof,Sys_dof); % initialization of system mass matrix ff=zeros(Sys_dof,1); % initialization of system force vector bcdof=zeros(Sys_dof,1); % initializing the vector bcdof bcval=zeros(Sys_dof,1); % initializing the vector bcval index=zeros(No_nel*No_dof,1); % initialization of index vector ------------------------------------------------------------------------------------------------------ 未定義變量是否可以理解為Beam_InputData547=？？？ 或Beam=input（data547），但在源文件中并未找到相關(guān)信息。 另外本章源程序開始第一句均為”Beam_InputData ” 均出現(xiàn)如上問題，懇請大神賜教��！ 現(xiàn)將第五章相關(guān)內(nèi)容及程序在附上。。。 錯(cuò)誤提示.png |
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