Transverse galloping is a type of flow-induced vibration (FIV) that leads to critical design considerations for engineering structures. A purely nonlinear energy sink (NES) composed ball free rotate in circular track experimentally mitigated the square previous study. The current study introduces model simulating dynamics prism coupled with ball-in-track (BIT) NES and predicting system behaviou...

BACKGROUND Fingers-transmitted vibration can cause vibration-induced white finger. The effectiveness of vibration-reducing (VR) gloves for reducing hand transmitted vibration to the fingers has not been sufficiently examined. OBJECTIVE The objective of this study is to examine tool-specific performance of VR gloves for reducing finger-transmitted vibrations in three orthogonal directions (3D)...

Well structures with ultra-long sections have become one of the most applied technologies in field shale gas development. While there been many technical challenges, enhancing breaking efficiency and stability polycrystalline diamond compact (PDC) bits has an essential issue focus. Since 2013, well structure Duvernay area optimized multiple times, rate penetration (ROP) entire wellbore nearly d...

In recent years, Wireless Sensor Networks (WSNs) have gathered a lot of attention as an important research domain. A typical WSN is a multi-hop wireless network consisting of small sensor devices that are capable of sensing, processing (computing), and communicating. These devices sense the environment (temperature, pressure, vibration, acoustics, etc.), process the sensed data often in a distr...

There are over one million workers exposed to hand-arm vibration in the United States. Cases of handarm vibration syndrome have been reported in the U.S. since 1918. Typical hand-arm vibration exposure conditions are given in this presentation. Vibration control methods are discussed; these include vibration damping and isolation, use of antivibration (A/V) tool and gloves, and the application ...

Abstract Polycrystalline Diamond Compact (PDC) bit has been used widely in drilling operations since a long time ago. However, the utilization of this Indonesia’s geothermal just recently started 2016, thanks to rapid development PDC cutter grades and shapes last decade. Prior that, operation relied on Tungsten Carbide Insert (TCI) drill hard formations. The crushing action insert is very durab...

The rock-breaking efficiency of a drilling tool directly affects the production costs and progress foundation construction. It is essential to understand mechanism mechanical improve efficiency. In this study, dynamic simulation research was carried out on drill bit based LS-DYNA platform. Additionally, influence rotational speed spindle feed rate force in process obtained. vibration also analy...