Abstract The energy dissipation in sinusoidally driven particle dampers is highly dependent on the motion mode of bed. Especially, for applications low acceleration intensity, i.e., amplitude below gravitational acceleration, only small rates are obtained so far, due to sticking particles. Here, a new and more efficient design introduced such applications, whereby focus horizontal vibrations. p...

Building structures are vulnerable to the shocks caused by earthquakes. Buildings that have been destroyed an earthquake very detrimental in terms of material loss and mental trauma. However, technological developments now enable us anticipate from earthquakes minimize losses. One technologies has used, is currently being further developed, a damping device fitted building structure. There vari...

This study presents the operation of a biotrickling filter when treating a monochlorobenzene (MCB) contaminated gaseous emission. Treatment dynamics were characterised by exposing the reactor to various MCB Organic Loads (OL). The use of different growth support materials, namely limestone, sand, ceramic and PVC pall-rings, was investigated. Limestone led to dogging of the reactor due to the ac...

We have examined the properties of six heat and moisture exchange filters (HMEF) to ascertain their resistance to liquid flow and their ability to retain a challenge bacterium, Pseudomonas diminuta, from aqueous and nebulized suspensions. Only one HMEF, the Pall Ultipor was able to withstand a significantly greater pressure of liquid than that found in clinical practice. However, when breached,...

A Pall Maxi-Gaskleen purifier of the Pall AresKleen family of gas purification products was evaluated for its efficacy in reducing oxygen impurities in a silicon germanium (SiGe) deposition process for a strained silicon application at a major IDM in the US. Impact on process parameters such as hydrogen pre-bake temperature and interfacial/within-film oxygen concentration were studied as a func...

Semi-active control systems have been widely studied over the last 20 years. The range of applications includes automotive suspensions, seismic vibration mitigation, large bridges vibration control, knee prosthesis, among others. Semi-active actuators have a complex dynamics, and interaction between actuator and plant cannot be ignored in control design. This is specially true for magneto-rheol...

The paper presents an application of the Skyhook control of suspension MR dampers in a vehicular vibration control system. Experiments were conducted using an ATV (all-terrain vehicle) traversing a test route. The system elements were analyzed and calibrated paying special attention to the space orientation of sensors and MR dampers. Orientation data and inversed Bingham model, which maps dynam...

In this study, the performance of triangular added damping and stiffness (TADAS) dampers combined with curved dampers (Curved-TADAS damper) is evaluated in moment resisting steel frame (MRSF). These dampers are passive and install in the beam-column connection region. Variable parameters of this study involve the width of curved damper (50, 75 and 100 mm), the thickness of TADAS damper (5 and 1...

The present work deals with the structural analysis of turbine blades and modeling of turbine blades. A common failure mode for turbine machines is high cycle of fatigue of compressor and turbine blades due to high dynamic stresses caused by blade vibration and resonance within the operation range of the machinery. In this work, proper damping system will be analyzed to reduce the vibrating bla...

This paper presents results from a comprehensive experimental program on fluid dampers in an effort to extract their force output during cyclic loading by simply measuring the strain on the damper housing and the end-spacer of the damper. The paper first discusses the path of stresses within the damper and subsequently via the use of elasticity theory shows that the experimental data obtained w...