Abstract: Dynamics of an elastic structure subjected to simultaneous horizontal and vertical earthquake ground accelerations are considered. The Liapunov method is used and several general bounds on the maximum responses are developed. ...

Abstract: Motions of particles in a simulated three‐dimensional random Gaussian flow field are numerically studied. The equation of motion of a solid particle (the generalized BBO equation), in addition to the Stokes drag, the Basset ...

Abstract: The sensitivity of base‐isolated structures to wind loadings is studied. The wind velocity is decomposed into mean and random fluctuating parts. A stationary random model for the fluctuating part of wind velocity is ...

Abstract: The problem of ponding instability of inflated imperfect cylinderical membranes is considered. It is shown that the existence of a small depression which allows the start of ponding of a fluid may lead to instability and ...

Abstract: Dispersion of ellipsoidal particles in a simulated isotropic pseudo-turbulent field is studied. A procedure using Euler’s four parameters in describing the particle orientations is used, and the ...

Abstract: Passive base vibration-control systems for reducing the transfer of orbiter vibration energy to its payload during liftoff are studied. The launch vehicle payload is modeled as a nonuniform flexible structure, and its ...

Abstract: The theory of ponding instability of inflated imperfect spherical membranes subjected to a central load is considered. The equilibrium of the imperfect spherical cap is analyzed and the expression relating the critical ...

Abstract: A simple kinetic model for flows of nearly elastic granular materials in the grain‐inertia regime is presented, which includes the effects of frictional‐energy dissipation during collision. It is shown that frictional ...

Abstract: In this work, the response analysis of a randomly excited nonlinear system is considered. The system resembles a frictional base isolation system under random earthquake excitation. The equivalent linearization technique ...