this research includes both experimental and cfd investigation in the hydrodynamic behavior of a new type of column tray introduced as “concap” tray. the proposed column tray is used in contactor columns especially in stripping columns. the hydrodynamics of this concap tray is investigated in a 1.2m in diameter column. using air-water system, the experiments were performed for different liquid ...

This study focuses on tuned liquid dampers (TLDs) using liquids with different characteristics optimized the adaptive harmony search algorithm (AHS). TLDs utilize characteristic features of to absorb dynamic forces entering structure and benefit from sloshing movement spring stiffness created by mass. have been investigate effect control analyzing various liquids. For optimization, memory consi...

Considering the stress cycles in the joints and members due to wave induced forces on offshore platforms, fatigue analysis is therefore one of the most important analyses in the offshore platforms design. Although most of the steel jacket type platforms are designed and located in areas with relatively high ratios of operational sea-states, for maximum environmental events, would have acceptabl...

The paper discusses the design and performance of a novel type of passive control system used for suppressing unwanted vibrations in civil engineering structures subjected to both lateral and base excitation. The new control system is inspired by the traditional tuned mass damper (TMD) with the modification that the mass is replaced by an inerter. An inerter has a two-terminal flywheel device c...

In recent years, the Tuned Mass Damper with inerter (TMDI) has received significant attention. The is defined to exert a force that in proportion relative acceleration of two terminals. Here, TMDI topologies are investigated. conventional topology given by being parallel spring and viscous damper TMDI. other serial arrangement spring, stiffness mass oscillator While first intends increase inert...