What this paper does is as following:First, on the basis of Przemieniecki finite dynamic element concept, those are respectively calculated as follow: dynamic shape functions, dynamic stiffness and mass matrices of Timoshenko beam element and QUAD4 rectangle plate element.

The advantages that DEM needs less elements and can provide higher precision are revealed. Fifth, for plate element, using bubble function, starting with energy functional, a uniform DEM expression is deduced.

In this paper,a vibration analysis model for stiffened plates of ship's local structures using Mindlin plate element and reference axis beam element is proposed. The model imcorporates the shear deformations of both, the plate and the stiffeners with the eccentric effect of the siffeners. A comparison of computational accuracy of different FEM models for vibration analysis of ship's stiffened plates are given.

On the basis of discussing on the beam element, the thickness of the plate element t and the inertia Iy as the parameters of sensitivity analysis were discussed to analyze the structure parameter by themethod of the difference sensitivity analysis.

On the basis of discussing on the beam element, the thickness of the plate element t and the inertia I_y as the parameters of sensitivity analysis were discussed to analyze the structure parameterby themethod of the difference sensitivity analysis. The more sensitive parameters were get after analysis, and it can be used to the amending of dynamical optimize.

Based on Smith method, the Simplified Progressive Collapse Method for analyzing ship structure ultimate longitudinal strength is presented by applying beam-column theory, elasto-plastic assumption, plane section assumption and plastic hinge theory. The whole procedure has been coded into a FORTRAN program called SPCM. The bending moment-curvature curve is calculated by integrating the moment of each stiffened plate element to the instant elastic neutral axis of the whole section.

Using Rahman's curves of the standard relationship of stiffened plate element,this article issues a progressive method to compute ultimate strength for Ships.

This paper takes a combination of plate element and concerntrated mass as the mechanical model. Beam model is used as the main hull when coupling vibration of superstructure and hull is taken into consideration so that to simplize the caluclation of the formation of mechanical model.

The first element is a thin-plate element that is based on the Kirchhoff plate assumptions and captures both membrane and bending stiffness effects.

The results indicate the differences in the dynamic response of the transverse shear deformable eight-noded element as compared to a four-noded plate element.

The development of a shear-deformable laminated plate element, based on the Mindlin plate theory, for use in large reference displacement analysis is presented.

An eight noded composite plate element for the dynamic analysis of spatial mechanism systems

The results have been included for the first few frequencies of the plate element for all the boundary conditions viz.

The structural model test of a bulk carrier with topside tanks is carried out under four different loading conditions.The analysis is made by means of the finite element method in which beam elements and plate elements are employed. The technique of dependent nodes which are kinematically dependent upon the master nodesis introduced in order to reduce the number of degrees of freedom. The calculation method of equivalent nodal forces is discussed. It is found that the calculated results fitted...

The structural model test of a bulk carrier with topside tanks is carried out under four different loading conditions.The analysis is made by means of the finite element method in which beam elements and plate elements are employed. The technique of dependent nodes which are kinematically dependent upon the master nodesis introduced in order to reduce the number of degrees of freedom. The calculation method of equivalent nodal forces is discussed. It is found that the calculated results fitted the test data well.

A novel calculation method-composite modal synthesis method-is developed for fluid-structure coupling vibration. On the basis of hybrid substructure modal composed of fluid and solid substructure, this method combines bound mode(i. e. static transformative mode), which is applied to fluid substructure, with structure mode, which are treated as the following two modes, i. e. ( 1 ) Dynamic transformation mode given by the supe-relement modal synthesis method and( 2 )Craig' s fixed interface boundary mode, and...

A novel calculation method-composite modal synthesis method-is developed for fluid-structure coupling vibration. On the basis of hybrid substructure modal composed of fluid and solid substructure, this method combines bound mode(i. e. static transformative mode), which is applied to fluid substructure, with structure mode, which are treated as the following two modes, i. e. ( 1 ) Dynamic transformation mode given by the supe-relement modal synthesis method and( 2 )Craig' s fixed interface boundary mode, and transforms motion equations in two different ways for hybrid fluid-structure substructures by using the composite mode as the generalized coordinate. By applying the technique of first assembling fluid substructure and then assembling solid substructure, the method can eliminate all degrees of freedom of fluid element and all internal degrees of freedom of solid substructure while only maintain interfacing boundary degrees of freedom for solid substructure. The subsequently calculated matrix of the eigen value retains the same order with achievable by the superelement modal synthesis method and Craing's normal(principal) mode method, thus resulting in great reduction of computer time.This method has been applied for the calculation of the fluid-structure coupling vibration of a cubic rectanguler box composite plate elements of both curved elements and plane film elements, and for the finite elements of a three-dimensional rectangular body, and has given identical numerical results with integrated finite element method and experimental results of optical measurement testing.This method is especially applicable to the calculation of ship fluid-structure coupling vibration which features large amount of fluid-structure interfacing degrees of freedom and small amount of structural interfacing degrees of freedom, as well as to calculation problems of the same kind of offshore structure and other engineering structures. Compared with con ventional calculation method for fluid-structure coupling vibration, it is of practical significence and economic effectiveness.

This paper takes a combination of plate element and concerntrated mass as the mechanical model. Beam model is used as the main hull when coupling vibration of superstructure and hull is taken into consideration so that to simplize the caluclation of the formation of mechanical model. Both auto-counting of the mass of entrained water and model synthesis (dynamic substructure method)are adopted in the calculation program.Therefore, the coupling relation between the vibrations of superstructure and hull can...

This paper takes a combination of plate element and concerntrated mass as the mechanical model. Beam model is used as the main hull when coupling vibration of superstructure and hull is taken into consideration so that to simplize the caluclation of the formation of mechanical model. Both auto-counting of the mass of entrained water and model synthesis (dynamic substructure method)are adopted in the calculation program.Therefore, the coupling relation between the vibrations of superstructure and hull can be easily judged. The calculation method of the coupling vibration of superstructure and beam its computing procedure are emphatically describ ed in the paper. This method is useful to ship designers, especially at the detail design stages.