Showing papers in "Computers & Structures in 1979"

TL;DR: In this paper, a numerical procedure is developed to analyze complex 3-dimensional assemblies of substructures and cables, which is applicable to guyed towers, flexible transmission lines, cable roofs or mooring networks.

TL;DR: In this paper, a higher order corotational finite formulation which accounts for initial curvature and moderate variations of rigid body rotation within an element is developed, applied to several shallow arches loaded by a concentrated load.

TL;DR: In this article, a nonlinear static analysis of a plane cable-stayed bridge structure is presented, considering the effect of initial cable tensions, member dead weights, and distributed and concentrated live loads.

TL;DR: In this paper, a number of problem areas which limit the realization of the full potential of computerized symbolic manipulation in structural mechanics are examined and some of the means of alleviating them are discussed.

TL;DR: In this paper, a computer-oriented method for obtaining dynamical equations of motion for large mechanical systems or "chain systems" is presented, defined as an arbitrarily assembled set of rigid bodies such that adjoining bodies have at least one common point and such that closed loops are not formed.

TL;DR: In this paper, a method for representing mild geometrically nonlinear static behavior of thin-type structures, within the finite element method, in terms of the solution of a certain eigenvalue problem is described.

TL;DR: A new approach to gain control of the discretization error by increasing the number of degrees of freedom in regions where the initial finite element model is not adequate is demonstrated by applications to two- and three-dimensional elasticity, including singularity problems.

TL;DR: In this article, the elasticity matrix of a general-purpose finite element program, SAPIV, is modified in such a way that it becomes possible to idealize water as a structural finite element with zero shear modulus.

TL;DR: In this paper, the displacement formulation of the finite element method is adopted to account for large displacements by using a Lagrangian description of motion from a fixed reference frame, assuming small strains and moderately large rotations.

TL;DR: In this article, a finite element procedure for the dynamic analysis of fluid-structure systems is presented and evaluated, where the fluid is assumed to be inviscid and compressible and is described using an updated Lagrangian formulation.

TL;DR: In this article, a numerical technique is described for analyzing contact of disconnected structures through the use of finite element gaps, where a special gap element is used, together with a stress invariance principle, to model the contact process.

TL;DR: In this article, a general theory that describes the B.I.E. linear approximation in potential and elasticity problems is developed, and a method to tread the Dirichlet condition in sharp vertex is presented.

TL;DR: In this article, the performance of five Lagrangian and Serendipity (4,8,9,12 and 16 noded) isoparametric elements in the free vibration finite analysis of Mindlin plates is evaluated.

TL;DR: The results of the research presented are extrapolated to indicate a number of highly promising directions of future research, both in the specific area of finite element analysis and in general areas of utilization of symbolic processing.

TL;DR: The PARS (Programs for Analysis and Resizing of Structures) system as mentioned in this paper is a user oriented system of programs for the minimum weight design of structures modeled by finite elements and subject to stress, displacement, flutter and thermal constraints.

TL;DR: A relatively-straightforward mesh generation program based on isoparametric mapping concepts is presented and an automatic node renumbering scheme is included to minimize the nodal connectivity of the generated mesh.

TL;DR: In this paper, a general procedure for calculating the free vibration of stiffened skew plates by the Rayleigh-Ritz method with B-spline functions as coordinate functions was presented, and the results were compared with existing values based on other numerical methods.

TL;DR: The objective of this paper is to familiarize users of general purpose programs for plastic analysis with the assumptions and models generally employed in describing nonlinear material behavior.

TL;DR: An overview is presented of the authors' recent theoretical and experimental results on reliable and computationally efficient a - posteriori error bounds for finite element solutions and the design of an experimental finite element system currently under development which incorporates many of these ideas and results.

TL;DR: In this paper, an integral equation method for thin elastic clamped plates of arbitrary plan form was extended to include arbitrary boundary conditions (i.e. clamped, simply-supported and free edges).

TL;DR: This three-part paper reviews general features of scientific data management from a functional standpoint and special emphasis is given to the discussion of trends in the development of large-scale programs, as well as to the assembly of database-linked program networks for engineering analysis.

TL;DR: An integrated computer program called Field Analysis of Shells of Revolution (FASOR) currently under development for NASA is described in this article, which extends the class of problems treated to include general anisotropy and transverse shear deformations of stiffened laminated shells.

TL;DR: A description is presented of the architecture of a prototype 'finite element machine' currently being built, with attention given to details regarding the finite element analysis problem, the arrangement of the processors as finite element nodes in the structural model, the influence of the Architecture on the solution algorithm, interprocessor communication primitives, and the performance of the finiteelement machine.

TL;DR: A new language, specifically designed to assist in the teaching of modern structural analysis, is presented that can be used in either batch or time-sharing mode and has been used on large main frame computer and on small 16-bit minicomputers.

TL;DR: In this paper, an efficient macro-element formulation for static analysis of curved box-girder bridges with variable cross section is presented, where the effect of prestressing is properly taken into account in the form of appropriate local loads considered at the element level.

TL;DR: Computational algorithms are presented for the finite element dynamic analysis of structures on the CDC STAR-100 computer and the spatial behavior is described using higher-order finite elements.

TL;DR: In this article, an effective optimality criterion computer design approach for member size selection to improve frequency characteristics for moderately large structure models is presented. Butler et al. showed that the implementation of the simultaneous iteration method within a natural frequency structural design optimization provides a method which is more efficient in isolating the lowest natural frequency modes than the frequently applied Stodola method.

TL;DR: In this paper, a finite element formulation for analyzing large amplitude free flexural vibrations of elastic plates of arbitrary shape is developed for analyzing stress distributions in the plates, deflection shape and nonlinear frequencies.

TL;DR: The “drag mesh” method for automatic generation of finite elements is presented, featuring simple, efficient element and node generation in regions of a structural model where a similarity of cross section is maintained.

TL;DR: In this article, a finite-difference formulation that gives accurate bending moments for thin elastic plates is presented, where the biharmonic equation is replaced with two deflection-normal bending moment relations and the equilibrium equation in terms of the moments.