In this study, three-dimensional finite element models of high-mast light poles without and with spiral helical strakes were built using ANSYS software to investigate their vibration characteristics in a wind environment. Based on two-way, fluid–structure interaction simulation method, the dynamic responses under different windspeeds analyzed. The results indicate that pole structure may suffer...

The robotic grinding system for a thin-walled workpiece is multi-dimensional coupling composed of robot, spindle and the workpiece. In process, dynamic effect generated, while stimulates elastic vibration; spindle, as an electromechanical actuator, sensitive to vibration in form load fluctuations. It necessary investigate characteristics under well control system. Firstly, considering between w...

Purpose – The purpose of this paper is to detail the design of a fractional controller which was developed for the suppression of the flexural vibrations of the first mode of a smart beam. Design/methodology/approach – During the design of the fractional controller, in addition to the classical control parameters such as the controller gain and the bandwidth; the order of the derivative effect ...

An input (e.g., airplane takeoff sound) to a sensory modality can suppress the percept of another input (e.g., talking voices of neighbors) of the same modality. This perceptual suppression effect is evidence that neural responses to different inputs closely interact with each other in the brain. While recent studies suggest that close interactions also occur across sensory modalities, crossmod...

this paper carries out the experimental research and analysis on the vortex-excited vibration suppression effect of the spiral stripe strake via the laser particle velocimeter (PIV) under vortex speed U=0.6 m/s and attack angle α=300 and discusses the VIV suppression mechanism of the spiral stripe strake by using the numerical simulation of the computational fluid dynamics (CFD) in order to obj...

This paper describes the related research work in field of fluid-induced vibration centrifugal pumps conducted by many researchers. In recent years, all walks life have put forward higher demands for performance which drives investigation on root cause pump and development guidelines design low-vibration pumps. Fluid-induced excitation is most important significant source vibration. Understandi...

Thin film bulk acoustic wave (BAW) resonators and filters operating in the GHz range are used in mobile phones for the most demanding filtering applications and complement the surface acoustic wave (SAW) based filters. Their main advantages are small size and high performance at frequencies above 2 GHz. This work concentrates on the characterization, performance optimization, and modelling tech...