scholarly journals An analytical solution for the rotational component of the Foundation Input Motion induced by a pile group

2017 ◽  
Vol 97 ◽  
pp. 424-438 ◽  
Author(s):  
Raffaele Di Laora ◽  
Yado Grossi ◽  
Luca de Sanctis ◽  
Giulia M.B. Viggiani
Keyword(s):  
Analytical Solution ◽  
Pile Group ◽  
Rotational Component ◽  
Input Motion

scholarly journals Diffusion-rotational parameterization of eddy fluxes of potential vorticity: barotropic flow in the zonal channel

2019 ◽  
Vol 55 (1) ◽  
pp. 3-16
Author(s):  
V. O. Ivchenko ◽  
V. B. Zalesny
Keyword(s):  
Analytical Solution ◽  
Potential Vorticity ◽  
Rotational Component ◽  
Flow Disturbances ◽  
Barotropic Flow ◽  
Eddy Fluxes ◽  
Potential Enstrophy

The problem of parametrization of the eddy fluxes of a potential vorticity is discussed. Traditional diffusion parameterization is complemented by the inclusion of a rotational component. For the analysis of the new scheme, a quasi-geostrophic model of the dynamics of the barotropic flow in a zonal channel with a non-uniform bottom is used. An analytical solution of the problem is found and the influence of topography on the flow disturbances is discussed. It is shown that the equation for the eddy potential enstrophy allows to relate diffusion and «rotational» coefficients.

Influence of Cam Motions on the Dynamic Behavior of Return Springs

1998 ◽  
Vol 120 (2) ◽  
pp. 305-310 ◽  
Author(s):  
Q. Yu ◽  
H. P. Lee
Keyword(s):  
Analytical Solution ◽  
Dynamic Response ◽  
Dynamic Behavior ◽  
Response Spectrum ◽  
Equation Of Motion ◽  
Simple Expression ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Input Motion ◽  
Selection Of

Based on the analytical solution of the equation of motion for a single degree-of-freedom model of a spring, the relation between the dynamic behavior and the kinematic features of input cam motions is discussed in this paper. A simple expression for the dynamic response spectrum of the vibration excited by the input motion is presented. It provides a useful tool to estimate the effect of cam motions on the dynamic behavior of springs. A method for the selection of cam motion curves based on this response spectrum is also presented in the paper. Examples are given to illustrate the method.

scholarly journals Analytical Solution of Arbitrary Loaded Spatial Pile Group

2020 ◽  
Author(s):  
Petar Santrac ◽  
Zeljko Bajic
Keyword(s):  
Analytical Solution ◽  
Analytical Method ◽  
Pile Group ◽  
Load Test ◽  
Group Effect ◽  
Stiffness Coefficients ◽  
Pile Load Test ◽  
Pile Group Effect

This paper presents an analytical method for the calculation of the arbitrary loaded spatial pile group fixed or/and hinge jointed into a rigid cap. The method uses the vector and matrix procedures to derive spatial equations of equilibrium, in which unknown componential displacements appear. The stiffness coefficients in the equations can be determined analytically, numerically or by pile load test. The pile group effect are estimated approximately, reducing the piles stiffness coefficients which depend on pile position and its mutual distances.

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