Experimental Investigation of the Vibro-impact Capsule System

Dr. Yang Liu would like to acknowledge the financial support for the Small Research Grant (31841) by the Carnegie Trust for the Universities of Scotland. This work is also partially supported by the National Natural Science Foundation of China (Grant Nos. 11672257 and 11402224), the Natural Science Foundation of Jiangsu Province of China (Grant No. BK20161314).Peer reviewedPublisher PD

Wake oscillator equations in modelling vortex-induced vibrations at low mass ratios.

The current research explores the capabilities of Rayleigh and Van der Pol equations from the standpoint of accuracy of vortex-induced vibrations (VIV) modelling for low mass ratio cases. The two degree-of-freedom rigid structure model suggested by Postnikov et al. [1] is used as the base case and the fluid equations are modified to create seven options as alternatives to this model. The considered options constitute variation in damping terms, including introduction of additional damping coefficients (as different Van der Pol or Rayleigh parameters). Then the calibration is performed to identify the best set of coefficients to provide accurate match with the experimental data. The main aim is to predict correctly the development of the super-upper branch [2]. Experimental results by Stappenbelt and Lalji [3] for mass ratio 2.36 are utilised for the model calibration. Then the obtained models are validated using data from the series of experiments by Stappenbelt and Lalji [3] and published experimental data from other sources [2, 4]. The obtained results demonstrate the advantages of changes in damping terms. Overall, it is concluded that Rayleigh oscillator can be recommended to approximate the lift coefficient for low mass ratios

Path-following analysis of the dynamical response of a piecewise-linear capsule system

Acknowledgements The first author has been supported by a Georg Forster Research Fellowship granted by the Alexander von Humboldt Foundation, GermanyPeer reviewedPreprin

Global dynamics of a harmonically excited oscillator with a play : Numerical studies

This work was supported by the National Secretariat of Science, Technology and Innovation of Ecuador (SENESCYT); the Escuela Superior Politécnica del Litoral of Ecuador (ESPOL); the National Natural Science Foundation of China (11272268, 11572263) and Scholarship of China. A.S.E. Chong and Y. Yue acknowledge the hospitality of the Centre of Applied Dynamics Research at the University of Aberdeen.Peer reviewedPostprin

Multi-modes approach to modelling of vortex-induced vibration

Acknowledgements A.P. would like to acknowledge the support of the National Subsea Research Institute (NSRI) UK. E.P. and M.W. are grateful for partial support provided by the Italian Ministry of Education, University and Research (MIUR) by the PRIN funded program 2010/11 N.2010MBJK5BPeer reviewedPostprin

Feedback control of chaos in impact oscillator with multiple time-delays

Peer reviewe

2DOF CFD calibrated wake oscillator model to investigate vortex-induced vibrations

ACKNOWLEDGMENTS This work is supported by the National Subsea Research Institute (NSRI) UK.Peer reviewedPostprin

VIV of flexible structures in 2D uniform flow

Acknowledgements V.K. would like to acknowledge the support of the Industrial University of Tyumen, Tyumen, Russia, and the State Program ”Global Education”, Russia. This work has been performed using the Maxwell High Performance Computing Cluster funded by the University of Aberdeen. Authors would like to express their gratitude to Dr Andrew Starkey for the advices regarding optimisation procedures, to Naveed Khan for the technical advices on accelerating computations and to Dr Andrey Postnikov for the productive discussions.Peer reviewedPostprin

Experimental verification of the vibro-impact capsule model

Acknowledgments Dr. Yang Liu would like to acknowledge the financial support for the Small Research Grant (31841) by the Carnegie Trust for the Universities of Scotland.Peer reviewedPostprin

Calibration and comparison of VIV wake oscillator models for low mass ratio structures

V.K. would like to acknowledge the support of the Industrial University of Tyumen, Tyumen, Russia, and the State Program ”Global Education”, Russia. This work has been performed using the Maxwell High Performance Computing Cluster funded by the University of Aberdeen. Authors would like to express their gratitude to Dr Andrew Starkey for advices regarding optimization procedures and to Naveed Khan for technical advices on accelerating computations.Peer reviewedPostprin