Taking the snake action as vibration source on the basis of lateral dynamic equilibrium equations of vehicle-bridge system, the lateral dynamic response of vehicle are calculated and compared when the vehicle runs on the ground and passes through the bridge.
Based on dynamic equilibrium equations of three dimensional elasticity, a state equation was established for orthotropic foundation plates using double Fourier series, in which no assumption about stress or displacement modes was made. Analytical solutions and frequency equations of unified formulas were presented for thin and thick laminated foundation plates.
The interactive dynamic equilibrium equations of pile group-soil-structure system in time-domain are derived. The characteristic response of pile-soil-structure under vertical seismic s-wave is analyzed comprehensively by means of dynamic interactive factors of pile-to- pile which can be used to obtain impedance of pile-groups.
According to the dynamic equilibrium equations of a foundation subjected to harmonic torque,the torsional vibrations of an embedded cylindrical foundation are presented.
Based on the dynamic equilibrium equations, packaging weights were predicted by studying the respiration rates of fresh tomato fruits and the permeability of LDPE film under the conditions of different temperatures ( 5 ℃ ,25℃) and different oxygen concentrations (0 % -21%) .
Nonlinear dynamic equilibrium equations of cablemembrane structures under buffeting forces are derived and dynamic responses of such structure in time domain are obtained by Wilson-q integral and Newton-Raphson method.
Based on the principle of the hydraulic system of this signal generator, the dynamic equilibrium equations of influent and effluent flow are established by means of the flow-pressure characteristic relation of the valve.
On the basis of the virtual-displacement and the D'Alembert principles, a new initial-boundary-value problem is formulated for the system of dynamic equilibrium equations of two bodies contacting with friction over a constant area.
The displacements in the domains of typical finite elements are obtained from the assumed domain stress field by using the dynamic equilibrium equations.
The Newmark direct integration algorithm is used for the time discretization of the dynamic equilibrium equations for both the structural analysis and the semi-analytical (SA) sensitivity analysis.
We present a new procedure for the direct solution of the structure finite element dynamic equilibrium equations. It slove a difficulty how to control error accuracy in mode superposition and direct integration methods. In IBM-PC-XT computer we developed a program DDJDL3-W to realize this algorithm. The results show that it is of high computational efficiency.
In this paper,the influence of the DOF(degree of freedom)in an actual vehicle on the results of the dynamic analysis of a VBS (vehicle-bridge-system) is discussed. According to the interaction between wheel and track, and considering the track irregularities, the dynamic equilibrium equations of the VBS are derived. Seven kinds of different models are used to calculate the space dynamic responses of the bridge on which a train moves at five different speeds. The frequencies and...
In this paper, a study on finite element dynamic model optimization is conducted on the basis of taking the inherent frequency of the aircraft structure measured from the vi-bration experiments as the larger. A new optimization method by iteration is applied, on the basis of dynamic equilibrium equations and orthogonality. The stiffness matrix ele-ments are modified for optimization in order to compute inherent frequency in accord with the measured frequencies from the test.The metho...
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dynamic equilibrium equations
动力平衡方程
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