Print Class
This is an abstract super-class in the Object Oriented Programming (OOP) paradigm that generically specifies a printing object in the LESM (Linear Elements Structure Model) program.
This super-class is abstract because one cannot instantiate objects from it, since it contains abstract methods that should be implemented in (derived) sub-classes.
Essentially, this super-class declares abstract methods and define public methods that print model information and analysis results of the LESM (Linear Elements Structure Model) program in a text file or in the default output (MATLAB command window). These abstract methods are the functions that should be implemented in a (derived) sub-class that deals with specific types of models, such as a 2D truss, 2D frame, grillage, 3D truss or a 3D frame model.
Contents
Sub-classes
To handle different types of analysis models, there are five sub-classes derived from this super-class:
Class definition
Definition of super-class Print as a handle class.
classdef Print < handle
Public attributes
properties (SetAccess = public, GetAccess = public)
txt = 0; % output identifier (1 = MATLAB command window)
drv = []; % handle to an object of the Drv class
end
Constructor method
methods %------------------------------------------------------------------ function print = Print(txt) print.txt = txt; end end
Abstract methods
Declaration of abstract methods implemented in derived sub-classes.
methods (Abstract) %------------------------------------------------------------------ % Prints analyis results. results(print) %------------------------------------------------------------------ % Prints analyis model type. analysisLabel(print) %------------------------------------------------------------------ % Prints model description. % Output: % n_nl: number of nodes with applied loads % n_pd: number of nodes with prescribed displacement % n_ul: number of elements with uniformly distributed loads % n_ll: number of elements with linearly distributed loads % n_tv: number of elements with temperature variation [n_nl,n_pd,n_ul,n_ll,n_tv] = modelDescrip(print) %------------------------------------------------------------------ % Prints cross-section properties. section(print) %------------------------------------------------------------------ % Prints nodal support conditions. nodalSupport(print) %------------------------------------------------------------------ % Prints nodal loads. % Input arguments: % n_nl: number of nodes with applied loads nodalLoads(print,n_nl) %------------------------------------------------------------------ % Prints nodal prescribed displacements. % Input arguments: % n_pd: number of nodes with prescribed displacement nodalPrescDisp(print,n_pd) %------------------------------------------------------------------ % Prints elements information. elements(print) %------------------------------------------------------------------ % Prints uniformly distributed loads information. % Input arguments: % n_ul: number of elements with uniformly distributed loads unifElementLoads(print,n_ul) %------------------------------------------------------------------ % Prints linearly distributed loads information. % Input arguments: % n_ll: number of elements with linearly distributed loads linearElementLoads(print,n_ll) %------------------------------------------------------------------ % Prints thermal loads information. % Input arguments: % n_tv: number of elements with temperature variation temperatureVariation(print,n_tv) %------------------------------------------------------------------ % Prints results of nodal displacement/rotation. nodalDisplRot(print) %------------------------------------------------------------------ % Prints results of support reactions. reactions(print) %------------------------------------------------------------------ % Prints results of internal forces at element nodes. intForces(print) %------------------------------------------------------------------ % Prints results of elements internal displacements. elemDispl(print) end
Public methods
methods %------------------------------------------------------------------ % Prints header of analysis results. function header(print) fprintf(print.txt, '\n=========================================================\n'); fprintf(print.txt, ' LESM - Linear Elements Structure Model analysis program\n'); fprintf(print.txt, ' PONTIFICAL CATHOLIC UNIVERSITY OF RIO DE JANEIRO\n'); fprintf(print.txt, ' DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING\n'); fprintf(print.txt, ' AND\n'); fprintf(print.txt, ' TECGRAF/PUC-RIO INSTITUTE\n'); fprintf(print.txt, '=========================================================\n'); end %------------------------------------------------------------------ % Prints material properties. function material(print) fprintf(print.txt, '\n\n-------------------------------------\n'); fprintf(print.txt, 'M A T E R I A L P R O P E R T I E S\n'); fprintf(print.txt, '-------------------------------------\n'); if print.drv.nmat > 0 fprintf(print.txt, ' MATERIAL E [MPa] G [MPa] POISSON THERMAL EXP. COEFF. [/°C]\n'); for m = 1:print.drv.nmat fprintf(print.txt, '%4d %13.0f %10.0f %8.2f %20.3d\n', m,... 1e-3*print.drv.materials(m).elasticity,... 1e-3*print.drv.materials(m).shear,... print.drv.materials(m).poisson,... print.drv.materials(m).thermExp); end else fprintf(print.txt, ' NO MATERIAL\n'); end end %------------------------------------------------------------------ % Prints nodal coordinates. function nodalCoords(print) fprintf(print.txt, '\n\n--------------------------------\n'); fprintf(print.txt, 'N O D A L C O O R D I N A T E S \n'); fprintf(print.txt, '--------------------------------\n'); fprintf(print.txt, ' NODE COORD X [m] COORD Y [m] COORD Z [m] \n'); for n = 1:print.drv.nnp fprintf(print.txt, '%4d %11.3f %14.3f %14.3f\n', n,... print.drv.nodes(n).coord(1),... print.drv.nodes(n).coord(2),... print.drv.nodes(n).coord(3)); end end %------------------------------------------------------------------ % Cleans data structure of a Print object. function clean(print) print.txt = []; print.drv = []; end end
end