Showing papers in "Computers & Structures in 1997"

TL;DR: In this article, a general theory to develop the dynamic stiffness matrix of a structural element is outlined, and substantial saving in computer time can be achieved if explicit analytical expressions for the elements of the matrix are used instead of numerical methods.

TL;DR: It is demonstrated how a block-iteration allows a simple and efficient implementation of the method and how finite element meshes can be constructed adaptively on the local and the global scales.

TL;DR: In this paper, a numerical study of the behavior of perfobond rib shear connectors using the finite element analysis technique is presented, and it is found that the predicted capacities given by the equations derived from the numerical study were in good agreement with experimental results obtained from push-out test specimens, although the predicted values tended to be on the conservative side in most instances.

TL;DR: In this article, the authors describe a numerical model that simulates the vertical dynamic interaction between a train vehicle and the rail track, which is supported by two double-axle bogies at each end.

TL;DR: In this article, the von Karman type of geometrically nonlinear strain-displacement relationships, and harmonic balance method were used in deriving the equation of motion.

TL;DR: In this article, the Galerkin/finite element method and global Newton iteration are used to estimate the velocity and pressure fields of viscoplastic flows with yield surfaces, and the finite element scheme locates the characteristic material lines, such as interfaces and yield surfaces.

TL;DR: In this article, the authors summarized and reviewed several finite element formulations used to solve structural acoustics and fluid-structure interaction problems, which can be applied to a variety of applications, including acoustic cavity analyis, acoustic radiation and scattering from elastic structures vibrations of submerged structures, dynamics of fluid-filled piping systems, underwater shock analyis and transient acoustic.

TL;DR: In this article, the homogenization theory for periodic media is used for deriving the in-plane macroscopic non-linear behaviour of masonry, and two different assumptions are envisaged: plane stress and generalized plane strain.

TL;DR: In this paper, the authors discuss the importance of dynamic interaction between heavy vehicles and highway bridges and present a new method for calculating the dynamic response of bridges to dynamic wheel loads, which is used to investigate a simply-supported bridge traversed by a single degree of freedom vehicle model.

TL;DR: In this paper, an efficient numerical method for the computation of eigenpair derivatives for the real symmetric eigenvalue problem with distinct eigenvalues was presented, which preserves the symmetry and band of the matrices, allowing efficient storage and solution techniques.

TL;DR: In this paper, the steady-state vibrations of a simply-supported rectangular linear elastic laminated plate with embedded PZT layers are analyzed using the three-dimensional linear theory of elasticity.

TL;DR: In this paper, the authors reviewed mode acceleration and modal truncation augmentation methods used in modal response analyses and examined the rationale for using the methods and a theoretical relationship between the two methods.

TL;DR: In this paper, the use of material in a 2.5 m long fibreglass composite wind turbine blade is discussed. And a program was written to create a detailed finite element mesh of the blade, using design data from blade element theory and panel code predictions, in a format suitable for direct input into a commercially available finite element software package.

TL;DR: In this article, a modification of the nonlinear concrete material model currently employed in the ADINA finite-element computer programs to account for high strain rate effects is presented, which encompasses the strain-rate range from 10 −7 s −1 (quasi-static) to 10 3 s − 1, in both compression and tension.

TL;DR: In this paper, the problem of crack depth and position identification in frame structures is examined, using eigenfrequency measurements, and it has been established that a crack has an important effect on the dynamic behavior of a structure.

TL;DR: In this paper, a nonlinear transient heat transfer finite element model is developed to simulate the curing process of polymer matrix composites, where thermal properties, degree of cure and internal heat generation due to the exothermic reaction are permitted to vary within an element.

TL;DR: In this paper, a B-spline Rayleigh-Ritz method is proposed for free vibration analysis of skew fiber-reinforced composite laminates which may have arbitrary lay-ups, admitting the possibility of coupling between in-plane and out-of-plane behaviour and general anisotropy.

TL;DR: In this article, a simple cantilever beam is subjected to an unknown force and a simulated strain measurement is used to provide the experimental data, and the generalized cross-validation method is used for selecting an optimal smoothing parameter.

TL;DR: In this article, the geometrically nonlinear free vibration of symmetrically laminated rectangular plates (1st and higher modes) and the higher mode of an isotropic plate with fully clamped boundary conditions is studied, using the hierarchical finite element method (HFEM).

TL;DR: In this article, an analytical sensitivity analysis and optimization implementation for cable-stayed bridge design is described, which is based on the Vax/VMS version of the Modulef code [1 MODULEF Reference Guide.

TL;DR: A survey of the existing and some other yet unpublished T-element formulations can be found in this paper, where it is shown that their choice can considerably influence the accuracy of the solution.

TL;DR: The simulation analysis of vascular support structures (stents) is described, to provide designers with estimates of their in vivo structural behavior and fatigue properties, and how those complications were addressed in practice.

TL;DR: The theoretical basis of the constraint function method for general contact problems and some important characteristics of the method are discussed and static and dynamic conditions are considered.

TL;DR: In this article, a review of the methods for handling nonexistance or non-uniqueness problems is presented, and the accuracy and efficiency of several of these methods are compared and compared.

TL;DR: In this paper, a cubic polynomials for approximation of displacements and a quadratic polynomial for approximating rotations were provided for thin plates and shells.

TL;DR: In this article, a layer-wise theory for thermal buckling analysis of laminated composites is presented by using a variational principle and a finite element method is developed to formulate the problem.

TL;DR: In this article, the authors presented an algorithm for a time series analysis based on the high-order multivariate autoregressive model M-AR(P) for identifying structures excited by natural random forces.

TL;DR: In this paper, the effect of some parameters, such as stiffness and mass of the bridge, stiffness of the train, bridge span and track irregularities, on the performance of railway traffic on bridges is analyzed.

TL;DR: In this article, the local arc-length method for structures with strain-softening materials is described. But the method is based on the use of a constraint equation which uses displacement parameters associated with the localized failure zone in such structures.

TL;DR: In this paper, a comparison between numerical results and measured data is presented for the case of vibration isolation by an open trench, that was constructed for full-scale testing, and the influence of different parameters on the amplitude reduction, due to the presence of a trench, is studied.