A structural optimization criterion for linear mechanical systems subject to random vibrations is presented for supporting engineer’s design. It is based on a multiobjective approach whose Objective Function (OF) vector is done by stochastic reliability performance and structural cost indices. The first ones are structural reliabilities, and are evaluated for one or more failure types; they are...

The present study investigates the prediction efficiency of nonlinear system-identification models, in assessing the behavior of a coupled structure-passive vibration controller. Two system-identification models, including Nonlinear AutoRegresive with eXogenous inputs (NARX) and adaptive neuro-fuzzy inference system (ANFIS), are used to model the behavior of an experimentally scaled three-story...

This paper gives the numerical analysis on characteristics of active force in HMD control systems. In order to quantitatively evaluates the direction characteristics of active force with respect to the relative displacement or velocity of mass piece, a set of five performance indexes are defined, and also the ratios of either peak value or RMS value of active force to inertia force. This set of...

A tuned mass rocking wall (TMRW) is a passive control device that combines the merits of traditional damper (TMD) and (RW). TMRWs not only help avoid weak story failure host structure but can also be regarded as largely substructure in building structure. Through appropriate design frequency ratio, dissipate much more energy under earthquake excitations. In this paper, basic equations motion fo...