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Earthquake engineering and engineering Vibration 2010年第2期9卷 247-258页

作者： he xiaoyu and li hongnan 1.zhejiang provincial planning,design & research institute of communications,hangzhou 310006,china 2.state key laboratory of coastal and offshore engineering,dalian university of technology,dalian 116024,china zhejiang provincial planning Design &amp research institute of communications Hangzhou 310006 China

The dynamic equations of motion of asymmetric offshore platforms under three different environmental conditions:seismic action,wave action and their combination are established in this paper. In establishing these motion equations,three typical eccentricity types including mass eccentricity,rigidity eccentricity and their combination were considered,as are eccentricities that occur un-idirectionally and bi-directionally. The effects of the eccentricity type,the dynamic characteristics and the environmental conditions on the torsional coupling response of platforms are investigated and compared. An effort has also been made to analyze the inffluence of accidental eccentricity on asymmetric platforms with different eccentricity in two horizontally orthogonal directions. The results are given in terms of non-dimensional parameters,accounting for the uncoupled torsional to lateral frequency ratio. Numerical results reveal that the eccentricity type has a great inffluence on the torsionally coupled response under different environmental conditions. Therefore,it is necessary to consider the combination of earthquake and wave action in the seismic response analysis of some offshore platforms.

关键词： offshore platform asymmetric structure accidental eccentricity torsion coupling earthquake load wave load

The force of oblique incident wave on the breakwater with a partially perforated wall

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Acta Oceanologica Sinica 2005年第4期24卷 125-134页

作者： li Yucheng1*, liU Hongjie2, DONG Guohai11. state key laboratory of coastal and offshore engineering, dalian university of technology, dalian 116023, china2. zhejiang provincial Plan design & research institute of communications, hangzhou 310006, china state key laboratory of coastal and offshore engineering Dalian University of Technology Dalian 116023 China zhejiang provincial Plan design Research Institute of Communications Hangzhou 310006 China

Wave forces induced by the interaction between the oblique incident wave and the breakwater with a partially perforated front wall isinvestigated. The fluid domain is divided into two sub-domains and the eigen-function expansion method is applied to expanding ve-locity potentials in each domain. In the eigen-expansion of the velocity potential, evanescent waves are included. Numerical results ofthe present model are compared with other theories and a good agreement can be found between them. Experimental data have beencompared with the present theoretical results. The effect of the traverse wall on wave forces has been discussed in detail. On the basisof the linear wave theory, it is shown that in the range of engineering practice, the incident angle of wave has small influence on waveforces on the unit length of perforated caisson.

关键词： partially perforated oblique incident wave wave force

The theoretical study on diagonal wave interaction with perforated-wall breakwater with rock fill

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Acta Oceanologica Sinica 2009年第6期28卷 103-110页

作者： liU Hongjie liU Yong li Yucheng zhejiang provincial planning Design ＆ Research Institute of Communications Hangzhou 310006 China College of engineering Ocean University of China Qingdao 266100 China state key laboratory of coastal and offshore engineering Dalian University of Technology Dalian 116023 China

The interaction of diagonal waves with perforated-wall breakwater partially filled with rock fill is studied using the linear potential theory. By means of the matched eigenfunction expansion method, an analytical method is presented to calculate the reflection coefficient and the wave force coefficient of the breakwater. The calculated results of the reflection coefficient for limiting cases are the same to the existing results. The main effect factors of the reflection coefficient and the wave force coefficient are analyzed by numerical examples. With the increasing of thickness of rock fill, the wave force coefficient on the perforated wall generally decreases, while the reflection coefficient increases. With the increasing of the incident angle of the wave, the reflection coefficient of the breakwater first decreases, reaches its minimum, and then increases monotonously.

关键词： diagonal wave perforated wall rock fill reflection coefficient wave force

Dynamic Analysis of a 10 MW Floating offshore Wind Turbine Considering the Tower and Platform Flexibility

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Journal of Ocean university of china 2024年第2期23卷 358-370页

作者： GAO Shan ZHANG lixian SHI Wei WANG Wenhua WANG Bin li Xin key laboratory of Far-Shore Wind Power technology of zhejiang Province Hangzhou 311122China state key laboratory of coastal and offshore engineering Deepwater Engineering Research CenterDalian University of TechnologyDalian 116024China Powerchina Huadong engineering Corporation limited Hangzhou 311122China Faculty of Infrastructure engineering Dalian University of TechnologyDalian 116024China Ningbo institute of dalian university of technology Ningbo 315000China

Recently,semisubmersible floating offshore wind turbine technologies have received considerable *** the coupled simulation of semisubmersible floating offshore wind energy,the platform is usually considered a rigid model,which could affect the calculation accuracy of the dynamic *** dynamic responses of a TripleSpar floating offshore wind turbine equipped with a 10 MW offshore wind turbine are discussed *** simulation of a floating offshore wind turbine under regular waves,white noise waves,and combined wind-wave conditions is *** effects of the tower and platform flexibility on the motion and force responses of the TripleSpar semisubmersible floating offshore wind turbine are *** results show that the flexibility of the tower and platform can influence the dynamic responses of a TripleSpar semisubmersible floating offshore wind *** the flexibility of the tower and platform,the tower and platform pitch motions markedly increased compared with the fully rigid ***,the force responses,particularly for tower base loads,are considerably influenced by the flexibility of the tower and ***,the flexibility of the tower and platform for the coupled simulation of floating offshore wind turbines must be appropriately examined.

关键词： floating offshore wind turbine TripleSpar semisubmersible platform rigidity and flexibility platform coupled simulation

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高潮位洪水的致灾机制、风险评估与预报评述

地理科学进展 2024年第1期43卷 190-202页

作者：李思达方佳毅周巍蒋廷臣柳林涛冯曦大地测量与地球动力学国家重点实验室中国科学院精密测量科学与技术创新研究院武汉430077 杭州师范大学遥感与地球科学研究院杭州311121 浙江省城市湿地与区域变化研究重点实验室杭州311121 热带海洋环境国家重点实验室中国科学院南海海洋研究所广州510301 江苏海洋大学海洋技术与测绘学院江苏连云港222005 河海大学港口海岸与近海工程学院南京210098 海岸灾害及防护教育部重点实验室南京210098

全球气候变化背景下,由海平面上升带来的长期慢性水患——一种发生于高潮位附近的小型海岸洪水变得愈加频繁,对沿海社会经济和自然环境造成一定影响,是当前国际上的研究热点之一。论文梳理了高潮位洪水的定义,并从高潮位洪水驱动因素、... 详细信息

全球气候变化背景下,由海平面上升带来的长期慢性水患——一种发生于高潮位附近的小型海岸洪水变得愈加频繁,对沿海社会经济和自然环境造成一定影响,是当前国际上的研究热点之一。论文梳理了高潮位洪水的定义,并从高潮位洪水驱动因素、影响与风险评估以及高潮位洪水预报3个方面,系统总结了相关研究方法与研究成果的主要进展以及存在的主要问题。未来建议加强沿海地区高潮位洪水的驱动因素、风险评估以及预报的研究工作,包括对高潮位洪水的广泛监测,从驱动因素的变化和驱动因素间的相互作用角度研究高潮位洪水的形成,对沿海关键地区和重要基础设施开展全面的高潮位洪水风险评估研究,开展更加准确可靠的高潮位洪水发生频次、持续时间的预报工作,最终服务于沿海城市高潮位洪水的防灾减灾。

关键词：高潮位洪水海岸洪水海平面上升风险评估预报模型

The fate of antibiotic resistance genes in the coastal lagoon with multiple functional zones

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Journal of Environmental Sciences 2023年第6期128卷 93-106页

作者： Shisheng li Hui Gao Haibo Zhang Guangke Wei Qin Shu Ruijing li Shuaichen Jin Guangshui Na Yali Shi laboratory for coastal marine eco-environment process and carbon sink of Hainan provincet/Yazhou Bay Innovation institute Hainan Tropical Ocean UniversitySanya 572022China National Marine Environmental Monsitoring Center Dalian 116023China College of Marine Ecology and Environment Shanghai Ocean UniversityShanghai 201306China School of Environment Hangzhou Institute for Advanced StudyUCASHangzhou 310024China

coastal lagoons provide many important services to human society,but their year-round use for aquaculture introduces large amounts of *** contamination of antibiotic resistance genes(ARGs)is therefore of great *** this study,50 ARGs subtypes,two integrase genes(intl1,intl2),and 16S rRNA genes were detected by high-throughput quantitative PCR,and standard curves of all target genes were prepared for *** occurrence and distribution of ARGs in a typical coastal lagoon(XinCun lagoon,china)were comprehensively *** detected 44 and 38 subtypes of ARGs in the water and sediment,respectively,and discuss the various factors influencing the fate of ARGs in the coastal ***-lincosamides-streptogramins B was the primary ARG type,and macB was the predominant *** efflux and antibiotic inactivation were the main ARG resistance *** XinCun lagoon was divided into eight functional *** ARGs showed a distinct spatial distribution owing to the influence of microbial biomass and anthropogenic activity in different functional *** rafts,abandoned fish ponds,the town sewage zone,and mangrove wetlands provided a large quantity of ARGs to the XinCun *** and heavy metals also significantly correlated with the fate of the ARGs,especially NO_(2)^(−)-N and Cu,which cannot be *** is noteworthy that lagoon-barrier systems coupled with persistent pollutant inputs result in coastal lagoons acting as a“buffer pool”for ARGs,which can then accumulate and threaten the offshore environment.

关键词： coastal lagoon Antibiotic resistance genes High-throughput qPCR Multifunctional zones Influence factors

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均衡态:动力-沉积-地貌系统的跨尺度联系

海洋学报 2018年第7期40卷 38-42页

作者：李炎国家海洋局第二海洋研究所国家海岛开发与管理研究中心浙江杭州310012 厦门大学福建省海陆界面生态环境重点实验室福建厦门361005

潮汐汊道P-A关系、岸线轮廓、浅海沙波剖面轮廓等3个海洋动力地貌学案例,属于能够同时满足"沿程能耗率处处相等,输沙率沿程递变处处相等,沉积速率处处相等"规律的动力-沉积-地貌系统均衡态。这种在流体力学、沉积动力学和动力地貌学时... 详细信息

潮汐汊道P-A关系、岸线轮廓、浅海沙波剖面轮廓等3个海洋动力地貌学案例,属于能够同时满足"沿程能耗率处处相等,输沙率沿程递变处处相等,沉积速率处处相等"规律的动力-沉积-地貌系统均衡态。这种在流体力学、沉积动力学和动力地貌学时空尺度跨度很大的交集中涌现的均衡态,为引导出动力-沉积-地貌系统跨尺度联系,实现动力-沉积-地貌系统的跨尺度模拟,留下宝贵的理论研究与应用检验窗口。

关键词：潮汐汊道平衡海滩浅海沙波均衡态