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Showing 1 to 20 of 119 for “"stiffness matrix"”.

  1. Numerically Generated Tangent Stiffness Matrices for Geometrically Non-Linear Structures

    Lebofsky, Sonia2013

    … involves tedious derivations of analytic tangent stiffness matrices. The major objective of the current work is to develop a numerically generated tangent stiffness matrix that allows for a general and easily implementable solution method. The thesis begins with the definition of the tangent …

    washington Repository record

  2. Stiffness Model of a Die Spring

    Forrester, Merville KennethVirginia Tech1998

    … research is to determine the three-dimensional stiffness matrix of a rectangular cross-section helical coil compression spring. The stiffnesses of the spring are derived using strain energy methods and Castigliano's second theorem. A theoretical model is developed and presented in order to …

    vt Repository record

  3. Combined Loading of Composite Box-Beams with Linearized Differential Equations of Motion

    DuPuis, Michael Alan

    … for ease of calculation. The Smith and Chopra stiffness matrix is used in the equations of motion, and software was written to solve for the stiffness matrix elements. Comparisons are made with bending slope solutions from previously published results, and the presented analysis is compared to …

    embry-riddle Repository record

  4. EFFECTS OF ROTARY INERTIA AND SHEAR DEFORMATION ON EXTENSIONAL VIBRATIONS OF CONTINUOUS CIRCULAR CURVED BEAMS

    SAID ISSA, MOHAMED EL-SAID

    … of continuous circular curved beams. The dynamic stiffness matrix is derived for the determination of natural frequencies of continuous curved beams undergoing in-plane vibrations. The formulation of stiffness matrix may be widely applied to problems with various consideration of Bernoulli-Euler …

    unh-thes Repository record

  5. Stiffness Analysis of Cable-Driven Parallel Robots

    Moradi, Amir2013

    The aim of this thesis is the stiffness analysis of cable-driven parallel robots. Cable-driven parallel robots have drawn considerable attention because of their unique abilities and advantages such as the large workspace, light weight of cable actuators, easy disassembly and transportation of the …

    queens Repository record

  6. TRUSS ANALYSIS USING SINGULAR IMBEDDING METHOD

    JENNGAMKUL, THIEM

    … law of material.</p><p>The final structural stiffness matrix equations are constructed for the different types of constraints. The unknown member areas are determined from the final structural stiffness matrix equations. The analysis limitations are presented and classified for a design …

    unh-thes Repository record

  7. Análise tridimensional de estruturas de edifício

    Fonte, Antônio Oscar Cavalcanti daUniversidade Federal do Rio de Janeiro1972

    … takes advantage of the properties of the band matrix that caracterizes the stiffness matrix. The technique used to assemble and store the stiffness matrix is a modified version of the partition method. Some examples are presented using this method.

    brazil-uerj Repository record

  8. Matrix analysis of rigid frames

    Murden, William PaulVirginia Tech1951

    The matrix power series method of inversion is impractical, since the series diverges, or converges extremely slowly, except in the analysis of very special and, usually, impractical frames. Dwyer’s method, Zurmuhl’s method, and the method of partitioning, used with discrimination, suffice to …

    vt Repository record

  9. An Analytical Investigation of Natural Frequency for a Symmetric Composite Box-Beam with Thermal Effects

    Chitikela, Lakshmi Narayana Sanjeev

    … and D'Alembert's method. The Smith and Chopra stiffness matrix is used in the governing equations of motion and an appropriate MATLAB® code has been written to solve for the stiffness matrix elements of the box-beam. The resulting governing equations of motion are solved to obtain the natural …

    embry-riddle Repository record

  10. Análise de edifícios pelo método das estruturas equivalentes

    Campos, João Carlos deUniversidade Federal do Rio de Janeiro1982

    … This program uses the properties of the banded stiffness matrix. The technique used to assemble and store the stiffness matrix is a modified version of the partition method. Comparisons between the procedure proposed and traditional methods are made for some particular structures. The results …

    brazil-uerj Repository record

  11. Implementação do cálculo do Fator de Cholesky diretamente a partir da matriz de rigidez do elemento estrutural

    Prates, Carlos Leopoldo MartinsUniversidade Federal do Rio de Janeiro1979

    … be found by rneans of obtaining a factor of the stiffness matrix of the structure. The most popular solution method involves the transformation of this matrix into an upper triangular matrix, the Cholesky factor. Here, it is shown how this factor may be obtained directly from the factor of the …

    brazil-uerj Repository record

  12. Adaptive finite element simulation of incompressible viscous flow

    Fithen, Robert MillerVirginia Tech1993

    … of iterative methods are used. For a symmetric stiffness matrix, the conjugate gradient method is used. For an unsymmetric stiffness matrix, the bi-conjugate gradient method is used. Both iterative solution methods make use of a diagonal preconditioning method (Jacobi preconditioning). Several …

    vt Repository record

  13. Damage detection in structures using frequency response function (FRF) data and finite element modelling

    Huynh, DungVictoria University of Technology2003

    … and damping. The resulting change in structural stiffness matrix is reflected in changes of FRF which can be exemplified by the evaluation of the damage location vector. This requires the dynamic stiffness matrix of the original undamaged structure and the frequency response curve of the …

    vu-aus Repository record

  14. Interação solo-estaca de plataformas offshore

    Valenzuela, Ernesto Daniel ChiangUniversidade Federal do Rio de Janeiro1980

    … of freedom. Applying Galerkin Techniques a stiffness matrix for the pile, including the soil properties, is developped, based on the integration of the differential equations for axial and lateral behaviour. The structural response is obtained using the iterative Newton-Raphson method. The …

    brazil-uerj Repository record

  15. Cálculo automático do efeito de vento em estruturas de edifício

    Soriano, Humberto LimaUniversidade Federal do Rio de Janeiro1971

    … are disregarded in this paper and transversal stiffness of the plane frames as well. The stiffness matrix of each plane frame is deduced. The stiffness matrices of the different plane frames are arranged conveniently and in such a way that the stiffness matrix of the spacial skeleton is of the …

    brazil-uerj Repository record

  16. Explicit stiffness matrices for triangular, plate bending finite elements

    Harrison, Robert LeedsDepartment of Civil Engineering1973

    Explicit stiffness matrices are available for rectangular plate bending elements, rectangular plane stress and plane strain elements and triangular plane stress and plane strain elements. Triangular plate bending elements can at present only be formed by using a numeric algorithm. The explicit …

    cape-town Repository record

  17. Um método interativo para análise de não-linearidade geométrica em estruturas reticulares

    Mantilla, Enrique PailliéUniversidade Federal do Rio de Janeiro1974

    … in the analysis: the axial forces on the member stiffness matrix and the changes of geometry caused by large displacements. A computer program writed in FORTRAN II is presented and numerical examples are included to illustrate the application.

    brazil-uerj Repository record

  18. Stiffness matrices of carbon nanotube structures

    Samaroo, Kirk J. (Kirk Jerome)Massachusetts Institute of Technology2005

    … modeling study was done to determine the stiffness matrices of the lattice structure of graphene, the planar building block of carbon nanotubes. Through continuum linear elastic analysis and a displacement-based finite element method, the global in-plane stiffness matrix for an arbitrary …

    mit Repository record

  19. Damage location and estimation in large space structures

    Twitty, Gregory B.Virginia Polytechnic Institute and State University1993

    … of elasticity. The damaged structure's global stiffness matrix is expressed as the healthy global stiffness matrix minus some perturbation matrix. A vector expression of the perturbation matrix allows the percent reduction in damage to be solved for exactly in an equation involving the healthy …

    vt Repository record

  20. Static, dynamic and aeroelastic behaviour of thin-walled composite structures with application to aircraft wings

    Khan, J.Z.City University London1992

    … for various aeroelastic phenomena. The dynamic stiffness matrix approach is used for structural idealization, while strip theory and Theodorsen's function C(k) are used for the aerodynamic idealization. The dynamic composite beam with with an axial load centroid, has been carried out using …

    city-london Repository record

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