The dynamic stability of a composite plate with external electrorheological (ER) damper subjected to an axial periodic load is investigated. Electrorheological fluids are a class of smart materials, which exhibit reversible changes in mechanical properties when subjected to an electric field. As a result, the dynamic behavior of the structure is changed. The ER damper is used for suppressing th...

Mechanical Engineering This study experimentally evaluates the dynamic response of a single vehicle suspension incorporating a magneto-rheological (MR) damper. A full-scale two-degree-of-freedom (2DOF) quarter-car test apparatus has been constructed at the Advanced Vehicle Dynamics Lab at Virginia Tech to evaluate the response of a vehicle suspension under the different control schemes of skyho...

Continuous girder bridges have been extensively constructed in China over the past 30 years, and these tend to experience severe damage under ground motions with velocity pulses. In current research, an innovative linear friction damper (LFD) is proposed mitigate seismic damages of continuous subjected near-fault motions. The OpenSees platform adopted establish numerical model a bridge region. ...

Comfort, reliability, functionality performance which provide a longer life cycle requires thourogh understanding and analysis of the vibrations, this is a general rule for most of the static and dynamic when studying the functionality performance of any application. Vibrations is an extremely important issue to consider when designing various systems.The hysteresis in the dampers is very impor...

Free cooling techniques can be used to substantially reduce energy costs. During cold weather, the outside ambient temperature can help in saving energy in refrigeration systems. The low temperature of the cooling ambient air supply enables free cooling technique to store fresh fruits and vegetables. This energy-efficiency measure can save enough compressor electric power to pay for modulating ...

We present a concept for facilitating the development of agent applications called agent usage patterns. These patterns are meant to bridge the conceptual gap that currently exists between the programmer and agent-based middleware systems. We analyze each pattern's potential for improving performance, reliability, and security. Finally, we describe some preliminary experiments: we present a sto...