A Simple Procedure for Embedding Seismic Loads in Foundation Superelements for Combined Wind, Wave and Seismic Analysis of Offshore Wind Turbine Structures

Nielsen, Martin Bjerre; Sahin, Emrah

doi:10.7712/120119.7255.19324

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM 2019

DOI: 10.7712/120119.7255.19324

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A Simple Procedure for Embedding Seismic Loads in Foundation Superelements for Combined Wind, Wave and Seismic Analysis of Offshore Wind Turbine Structures

Martin Bjerre Nielsen¹,

Emrah Sahin²

Abstract: A simple approach for integrating loads associated with seismic excitation of off-4628 COMPDYN 2019 7 th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering M. Papadrakakis, M. Fragiadakis (eds.

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Cited by 3 publications

References 9 publications

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Компьютерное Моделирование Напряженного Состояния Эксплуатируемых Резервуаров С Помощью Геометрических Интерполянтов

Конопацкий,

Шевчук,

Бездитный

2023

IJCCSE

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На примере моделирования напряжённого состояния эксплуатируемых цилиндрических резервуаров для хранения нефтепродуктов с несовершенствами геометрической формы реализован метод численного исследования тонкостенных оболочек инженерных сооружений, который включает составление и численное решение массива дифференциальных уравнений с последующей интерполяцией результатов и определением экстремальных значений перемещений (или напряжений), возникающих в резервуаре от действия гидростатической нагрузки с учётом геометрической и конструктивной нелинейности. Для реализации предложенного метода используется геометрическая теория многомерной интерполяции и аппроксимации, включая новый способ учёта начальных условий дифференциального уравнения. Последний заключается в параллельном переносе численного решения в нужную точку, координаты которой соответствуют начальным условиям. В результате удалось достичь значительного повышения быстродействия численного решения при сохранении достаточной для инженерных расчётов точности.

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Компьютерное Моделирование Напряженного Состояния Эксплуатируемых Резервуаров С Помощью Геометрических Интерполянтов

Конопацкий,

Шевчук,

Бездитный

2023

IJCCSE

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Use of interpolation methods for modeling the stress-strain state of operated oil storage tanks

Konopatskiy,

Krysko,

Shevchuk

2023

Struct. Mech. of Eng. Const. and Build

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The aim of the research is the comparison of two approaches for computer modeling of the stress-strain state of thin-walled shells of engineering structures, considering the imperfections of the geometric shapes arising due to their operation. The object of the study is the operated steel vertical cylindrical reservoir with imperfections of the geometric shape intended for storage of petroleum products. The first, so-called classical, approach provides geometric modeling of the surface of the tank's shell with the subsequent import of the geometric model into one of the systems of finite element analysis to calculate the stress-strain state of the structure and determine its technical condition, and the possibility of further operation. The geometric modeling of the shell surface with imperfections was performed using a two-dimensional interpolation method based on the 1st order smoothness outlines implemented in the point calculus. The calculation of the stress-strain state of the shell was carried out in the SCAD Office computer complex, taking into account geometric and structural non-linearity on the basis of the octahedral tangential stress theory. The second approach assumes modeling of an array of functions of vertical deflection of the tank wall by means of interpolation, solution of an array of differential equations of the elastic cylindrical shell under axisymmetric loading, improved by introduction of vertical deflection functions of the wall, followed by two-dimensional interpolation and analysis of the deformed state of the shell based on displacements arising in the tank wall from the hydrostatic load. As a result of the effective use of two-dimensional interpolation in the process of implementing the second approach, it was possible to achieve a significant increase in the speed of the numerical solution while maintaining sufficient accuracy for engineering calculations.

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Numerical Simulation of the Stress-Strain State of Metal Structures Using Geometric Interpolants

Konopatskiy

Shevchuk

2022

Automation and Modeling in Design and Management

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The work is devoted to carrying out multidimensional interpolation and approximation methods for the numerical solution of differential equations and computer model development of the stress-strain state of metal structures. The core of the work is a fundamental computational algorithm for the numerical solution of differential equations using geometric interpolants on regular and irregular networks. On its basis, computational experiments are carried out on numerical simulation of the stress-strain state of operated reservoirs for storing petroleum products, which form a software package implemented in the Maple interpreter. At the same time, the differential equation for modelling the stress-strain state of an elastic cylindrical shell under axisymmetric loading is improved for the numerical analysis of the stress-strain state of a cylindrical reservoir with geometric imperfections. Also a new approach is proposed to take into consideration the initial conditions of the differential equation, which consists of parallel transfer of the numerical solution to the point, its coordinates correspond to the initial conditions. The advantage of the proposed approach for the numerical solution of differential equations using geometric interpolants is that it eliminates the need to coordinate geometric information in the process of interaction between CAD and FEA systems, by analogy with the isogeometric method.

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A Simple Procedure for Embedding Seismic Loads in Foundation Superelements for Combined Wind, Wave and Seismic Analysis of Offshore Wind Turbine Structures

Abstract: A simple approach for integrating loads associated with seismic excitation of off-4628 COMPDYN 2019 7 th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering M. Papadrakakis, M. Fragiadakis (eds.

Cited by 3 publications

References 9 publications

Компьютерное Моделирование Напряженного Состояния Эксплуатируемых Резервуаров С Помощью Геометрических Интерполянтов

Компьютерное Моделирование Напряженного Состояния Эксплуатируемых Резервуаров С Помощью Геометрических Интерполянтов

Use of interpolation methods for modeling the stress-strain state of operated oil storage tanks

Numerical Simulation of the Stress-Strain State of Metal Structures Using Geometric Interpolants

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