Stochastic transients of a deepwater compliant platform.

A. Haldar, H. B. Kanegaonkar

Research output: ResearchChapter

Abstract

The transient dynamic behaviour of a guyed tower platform with nonlinear stiffness subject to random wave loading was investigated using a non-Gaussian closure technique. The individual storm wave loadings are represented by rational spectra. The stiffness nonlinearity is expressed in terms of analytical function. The differential equation of motion is expressed as a set of first order stochastic equations. Ito's rule of stochastic differentials is used to develop ordinary differential equations of moments of the response. The moments are then obtained by numerical solution of the equations. A new storm is considered to be acting on the structure when the structure is vibrating in a steady state from the previous storm. The transient behaviour of the stochastic response parameters was studied. It was found that the guyline tensions vary significantly during the transient state. Sudden drops and increases in the tensions leading to jerk or snap loading will also affect the fatigue of the guylines. The time-dependent probability distribution of the response in the transient state was also seen to vary significantly. (A)

LanguageEnglish (US)
Title of host publicationUnknown Host Publication Title
PublisherNew York, American Society of Mechanical Engineers
StatePublished - 1800
Externally publishedYes

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Stiffness
Container closures
Ordinary differential equations
Probability distributions
Towers
Equations of motion
Differential equations
Fatigue of materials

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Haldar, A., & Kanegaonkar, H. B. (1800). Stochastic transients of a deepwater compliant platform. In Unknown Host Publication Title New York, American Society of Mechanical Engineers.

Stochastic transients of a deepwater compliant platform. / Haldar, A.; Kanegaonkar, H. B.

Unknown Host Publication Title. New York, American Society of Mechanical Engineers, 1800.

Research output: ResearchChapter

Haldar, A & Kanegaonkar, HB 1800, Stochastic transients of a deepwater compliant platform. in Unknown Host Publication Title. New York, American Society of Mechanical Engineers.
Haldar A, Kanegaonkar HB. Stochastic transients of a deepwater compliant platform. In Unknown Host Publication Title. New York, American Society of Mechanical Engineers. 1800.
Haldar, A. ; Kanegaonkar, H. B./ Stochastic transients of a deepwater compliant platform.Unknown Host Publication Title. New York, American Society of Mechanical Engineers, 1800.
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