Structural Stability and Dynamics: Theory and Applications

Topic Information

Dear Colleagues,

The use of the ocean for various human activities, such as overseas airports, artificial islands, mobile offshore bases, underground storage tanks, platforms for marine renewable energy converters, military applications, and so on, has attracted significant interest in ocean engineering over the past few decades. Studying how waves interact with offshore buildings has therefore become increasingly important since it provides valuable insight into several physical processes related to coastal protection. The fundamental equations of structural mechanics, fluid mechanics, and wave propagation are all included in the multidisciplinary topic of wave–structure interaction, as well as the significance of various types of boundary conditions. Additionally, modeling and simulating wave interaction with various marine structures is a subject of fundamental importance for a clear understanding of wave energy distribution and attenuation.

The purpose of this Special Issue is to provide a platform for reporting on current developments in diverse mathematical techniques for the wave hydrodynamic performance of various maritime structures. It is highly recommended that studies take into account the importance of marine environments and different aspects of fluid–structure interaction. For research on coastal structures, this Special Issue may include theoretical, numerical, and experimental advancements.

Dr. Harekrushna Behera
Prof. Dr. Chia-Cheng Tsai
Prof. Dr. Jen-Yi Chang
Topic Editors

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Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Axioms axioms	2.0	-	2012	21.8 Days	CHF 2400
Computation computation	2.2	3.3	2013	18 Days	CHF 1800
Dynamics dynamics	-	-	2021	12.7 Days	CHF 1000
Mathematics mathematics	2.4	3.5	2013	16.9 Days	CHF 2600
Symmetry symmetry	2.7	4.9	2009	16.2 Days	CHF 2400

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All Axioms Computation Dynamics Mathematics Symmetry

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20 pages, 4536 KiB  

Open AccessArticle

Investigation of Dynamic Behavior of Ultra-Large Cold-Water Pipes for Ocean Thermal Energy Conversion

by Yanfang Zhang, Miaozi Zheng, Li Zhang, Chaofei Zhang, Jian Tan, Yulong Zhang and Menglan Duan

Dynamics 2023, 3(3), 468-487; https://doi.org/10.3390/dynamics3030025 - 18 Aug 2023

Viewed by 846

Abstract

Ocean Thermal Energy Conversion (OTEC) is a process that can produce electricity by utilizing the temperature difference between deep cold water and surface warm water. The cold-water pipe (CWP) is a key component of OTEC systems, which transports deep cold water to the [...] Read more.

Ocean Thermal Energy Conversion (OTEC) is a process that can produce electricity by utilizing the temperature difference between deep cold water and surface warm water. The cold-water pipe (CWP) is a key component of OTEC systems, which transports deep cold water to the floating platform. The CWP is subjected to various environmental and operational loads, such as waves, currents, internal flow, and platform motion, which can affect its dynamic response and stability. In this paper, we establish a computational model of the mechanical performance of the CWP based on the Euler–Bernoulli beam theory and the Morrison equation, considering the effects of internal flow, sea current, and wave excitation. We use the differential quadrature method (DQM) to obtain a semi-analytical solution of the lateral displacement and bending moment of the CWP. We verify the correctness and validity of our model by comparing it with the finite element simulation results using OrcaFlex software. We also analyze the effects of operating conditions—such as wave intensity, clump weight at the bottom, and internal flow velocity—on the dynamic response of the CWP using numerical simulation and the orthogonal experimental method. The results show that changing the wave strength and internal flow velocity has little effect on the lateral displacement of the CWP but increasing the current velocity can significantly increase the lateral displacement of the CWP, which can lead to instability. The effects of waves, clump weight, internal flow, and sea current on the maximum bending moment of the CWP are similar; all of them increase sharply at first and then decrease gradually until they level off. The differences in the effects are mainly reflected in the different locations of the pipe sections. This paper suggests some design guidance for CWP in terms of dynamic responses depending on the operating conditions. This paper contributes to the journal’s scope by providing a novel and efficient method for analyzing the mechanical performance of CWP for OTEC systems, which is an important ocean energy resource. Full article

(This article belongs to the Topic Structural Stability and Dynamics: Theory and Applications)

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