Experimental Investigation of the Effects of the In-Line Top-Motion on the Vortex-Induced Vibration Response of a Flexible Riser

This study is concerned with vortex-induced vibration (VIV) of deepwater marine risers. Riser response measurements from model tests on a densely instrumented long, flexible riser in uniform and sheared currents offer an almost ideal setup for our work. Our objectives are two-fold: (i) we use the measured data to describe complexities inherent in riser motions accompanying VIV; and (ii) we discuss how such data sets (and even less spatially dense monitoring) can be used effectively in predicting fatigue damage rates, which are of critical interest for deepwater risers.

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A Numerical Investigation of Vortex-Induced Vibration Response and Fatigue Damage for Flexible Cylinders Under Combined Uniform and Oscillatory Flow

China Ocean Engineering ◽

10.1007/s13344-020-0044-2 ◽

2020 ◽

Vol 34 (4) ◽

pp. 488-499

Author(s):

Yu-chao Yuan ◽

Hong-xiang Xue ◽

Wen-yong Tang

Keyword(s):

Numerical Investigation ◽

Fatigue Damage ◽

Oscillatory Flow ◽

Vibration Response ◽

Vortex Induced Vibration

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Experimental Investigation into the Vibration Response of an Aero-Engine Rotor-Damper Assembly

Proceedings of the Institution of Mechanical Engineers Part G Journal of Aerospace Engineering ◽

10.1243/pime_proc_1994_208_252_02 ◽

1994 ◽

Vol 208 (1) ◽

pp. 52-66 ◽

Cited By ~ 6

Author(s):

M C Levesley ◽

R Holmes

Keyword(s):

Experimental Investigation ◽

Harmonic Balance ◽

Vibration Response ◽

Linear Vibration ◽

Film Rupture ◽

Supply Pressure ◽

Balance Principle ◽

Aero Engine ◽

Rupture Pressure ◽

Engine Rotor

This paper presents experimental results on the non-linear vibration response of a rotating assembly comprising a rotor, flexible bearing housing and oil film damper. For the latter, due consideration is given to the effects of oil-supply pressure, film-rupture pressure and end sealing. The results are compared with predictions based on the Harmonic Balance principle described in a complementary paper (1).

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Innovative Experimental Investigation on the Influences of the Reynolds Number

10.5957/attc-2017-0056 ◽

2017 ◽

Author(s):

Jian Gu ◽

Antonio Carlos Fernandes

Keyword(s):

Experimental Investigation ◽

Reynolds Number ◽

Dimensionless Parameter ◽

Individual Effect ◽

Vortex Induced Vibration ◽

Industry Standards ◽

Experimental Facilities ◽

The Individual

The influences of Re (Reynolds number) on the response of vortex induced vibration (VIV) have been studied by previous researches, which indicate the influences should not be ignored. However, due to the limitation of experimental facilities and complexity of the cases, the explicit influence of Re on VIV is still not fully known. Meanwhile, the industry standards also do not supply design reference taking account of Re effects quantitatively. In present work, an innovative dimensionless parameter (denoted as “inertia-viscosity”) is proposed to displace the Re in the dimensionless system, in order to clarify the individual effect of Re. With this method, comparing tests are concisely carried out, and the effectiveness and feasibility are demonstrated. Through the comparing of tests, several remarkable results are obtained.

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