Deniz Boru Hattı Dinamik Davranışının Sonlu Elemanlar Yöntemi İle Analizi

Year 2019, Volume: 23 Issue: 2, 404 - 410, 25.08.2019

Begüm Yurdanur Dağlı Dilay Uncu Yeşim Tuskan

https://doi.org/10.19113/sdufenbed.494460

Cited By: 1

Abstract

Bu
çalışmada hidrodinamik kuvvetlere maruz kalan deniz boru hattının dinamik
davranışı Sonlu Elemanlar Yöntemi kullanılarak incelenmiştir. Dalga
parametreleri Stokes 3. Mertebe Dalga Teorisi kullanılarak hesaplanmıştır.
Dalga periyodu boyunca değişen sürükleme, atalet ve kaldırma kuvvetleri Morison
Denklemi ile belirlenmiştir. Zaman Tanım Alanında Analiz yaklaşımı dikkate
alınarak bir önceki kuvvet nedeni ile deforme olan sistem üzerine yeni yükleme
yapılmıştır. Sonlu Elemanlar Yöntemi ile periyot süresince kritik kesit
deplasman değerleri hesaplanmıştır. Elde dilen maksimum deplasmanlar, akış
analizini yapısal analiz ile birleştiren ANSYS-FSI (Fluid
Structure Interaction) tekniği
ile belirlenen değerler ile karşılaştırılmıştır. İki analize ilişkin sonuçların
tutarlı olması Sonlu Elemanlar Yönteminin eş değer dinamik analiz yapmak için
kullanılabileceğini göstermektedir.

Keywords

Hidrodinamik kuvvet, Sonlu elemanlar yöntemi, Stokes 3. mertebe dalga teorisi

Analysis of Dynamic Behaviour of Marine Pipelines with Finite Elements Method

Abstract

In
this study, the dynamic behaviour of the marine pipeline subjected to
hydrodynamic forces are investigated by using the Finite Element Method. Wave
parameters are calculated using Stokes 3^rd Order Wave Theory. The
drag, inertia, and lifting forces that changed during the wave period are determined
by the Morrison Equation. The new loading is performed on the system which is
deformed due to the previous force considering Time History approach. The
critical values of section displacements are calculated by using the Finite
Element Method. The maximum displacements are compared with those determined by
ANSYS-FSI (Fluid Structure Interaction) technique which combines structural
analysis with flow analysis. The concordance of the results of the two analysis
methods indicates that the Finite Element Method can be used to perform an
equivalent dynamic analysis.

Keywords

Hydrodynamic forces, Finite elements method, 3rd order Stokes wave theory

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