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Energy Harvesting From Sea Waves With Consideration of Airy and jonswap Theory and Optimization of Energy Harvester Parameters

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Journal of Marine Science and Application 2015年第4期14卷 440-449页

作者： Hadi Mirab Reza Fathi Vahid Jahangiri Mir Mohammad Ettefagh Reza Hassannejad Faculty of Mechanical Engineering University of Tabriz *** Tabriz Iran

One of the new methods for powering low-power electronic devices at sea is a wave energy harvesting system. In this method, piezoelectric material is employed to convert the mechanical energy of sea waves into electrical energy. The advantage of this method is based on avoiding a battery charging system. Studies have been done on energy harvesting from sea waves, however, considering energy harvesting with random jonswap wave theory, then determining the optimum values of energy harvested is new. This paper does that by implementing the jonswap wave model, calculating produced power, and realistically showing that output power is decreased in comparison with the more simple Airy wave model. In addition, parameters of the energy harvester system are optimized using a simulated annealing algorithm, yielding increased produced power.

关键词： energy harvesting sea waves jonswap Airy wave model piezoelectric material beam vibration simulated annealing algorithm

维普期刊数据库

jonswap谱参数C和γ对疲劳损伤的影响研究

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石油和化工设备 2018年第4期21卷 29-32页

作者：董志亮黄怀州赵佳宁任欣靳宝旺王越钊海洋石油工程股份有限公司天津300451

本文针对jonswap谱参数C和γ对疲劳损伤的影响进行研究。目前固定平台设计多采用谱疲劳进行疲劳分析,常用的有P-M谱和jonswap谱,对于jonswap谱,参数C和γ取值不一样,疲劳损伤也不一样。本文以某项目为例,使用SACS软件对该平台进行对比分... 详细信息

本文针对jonswap谱参数C和γ对疲劳损伤的影响进行研究。目前固定平台设计多采用谱疲劳进行疲劳分析,常用的有P-M谱和jonswap谱,对于jonswap谱,参数C和γ取值不一样,疲劳损伤也不一样。本文以某项目为例,使用SACS软件对该平台进行对比分析,分析过程中除jonswap谱参数C和γ外其他参数均一样。通过对比分析得出结论,参数C值一定,γ值越大,节点疲劳寿命越小;参数γ值一定,C值越大,节点疲劳寿命越大。

关键词：谱疲劳 jonswap SACS

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由jonswap谱和PM谱计算的风浪波高之间的关系

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海洋湖沼通报 1987年第1期 1-4页

作者：徐德伦山东海洋学院

一、序言 60年代中期以后,PM（Pierson-Moscowitz）谱在海浪研究及有关的工程问题中得到广泛的应用。众所周知,PM谱是由充分成长的风浪观测谱拟合而得到的,它代表充分成长的风浪。70年代中,根据JONSWP（Joint North Sea Wave Project）... 详细信息

一、序言 60年代中期以后,PM（Pierson-Moscowitz）谱在海浪研究及有关的工程问题中得到广泛的应用。众所周知,PM谱是由充分成长的风浪观测谱拟合而得到的,它代表充分成长的风浪。70年代中,根据JONSWP（Joint North Sea Wave Project）观测的2,500个有限风区风浪谱并参照PM谱又提出了jonswap谱

关键词：无因次风区谱形风浪波高谱峰频率 jonswap PM

Parameter Identification of jonswap Spectrum Acquired by Airborne LIDAR

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Wave Spectral Patterns during a Historical Cyclone: A Numerical Model for Cyclone Gonu in the Northern Oman Sea

中国海洋大学学报（英文版） 2017年第6期 998-1002页

关键词： jonswap SPECTRUM PARAMETER identification least SQUARE method AIRBORNE LIDAR

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Open Journal of Fluid Dynamics 2017年第2期7卷 131-151页

作者： Mohammad Nabi Allahdadi Nazanin Chaichitehrani Mohammadreza Allahyar Laura McGee North Carolina State University Department of Marine Earth and Atmospheric Sciences Raleigh North Carolina USA Louisiana State University Department of Oceanography and Coastal Sciences Baton Rouge Louisiana USA Iranian Ports and Maritime Organization Tehran Iran

The third generation wind-wave model Mike21-SW was used to study spectral characteristics of waves generated by the historical Cyclone Gonu in June 2007 along and off the Iranian coasts on the northern Oman Sea. The model was forced with the cyclone wind field generated using a Holland (1980) model based on cyclone data obtained from the Joint Typhon Warning Center (JTWC). The wave model was calibrated for the northern Oman Sea using bulk and spectral wave data at a station out of the Chabahar Bay. Evolution of directional-frequency spectra during the cyclone was investigated for two locations near the entrance and off the Chabahar Bay. At the offshore station, energy was contributed to the spectrum over an approximately 180 degree directional span that included different local and remotely generated waves. As the cyclone proceeded northwestward, all spectral directions continuously rotated in the clockwise direction at both locations. Frequency spectra at these locations were investigated for four different times corresponding to different locations of Cyclone’s eye and were justified using the sea growth parameter of the Joint North Sea Wave Project (jonswap) experiment. Using the modified jonswap parameters for hurricane conditions resulted in a frequency spectrum consistent with simulation results.

关键词： Cyclone Gonu Oman Sea Chabahar Bay Wave Modeling Wave Spectrum jonswap

A Literature Review of Wave-Induced Heave Motion of Floating Structures

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Journal of Architectural Research and Development 2018年第1期2卷 32-51页

作者： Jiaqi Xue School of Mechanical and Chemical Engineering University of Western Australia

This paper provides comprehensive review on heave motion of rigid floating structure due to wave *** specify and explain the structure response,this review firstly provides a brief introduction on ocean sea wave theory,floating structure motion *** the floating body motion in regular waves was demonstrated using a superposition method of the oscillated motion in still water and the restrained motion in ***,added mass and damping coefficient,these two frequency-dependent terms are brought into discussion to generate the motion response with given wave amplitude,which is known for response amplitude operator(RAO).Based on the study in regular waves,RAO of floating structure in irregular waves is introduced while no longer in time domain but in frequency *** whole review covers the literatures from the early 1980s up to nowadays,based on the review,it is recommended that more experimental work regarding to frequency characteristic and relative response of larger floating body should be carried out to improve the accuracy of this method.

关键词： Floating body heave motion analysis jonswap spectrum Response Amplitude Operator(RAO) literature review