检索结果-南通市图书馆

Dynamic Analysis of tension leg platform for Offshore Wind Turbine Support as Fluid-Structure Interaction

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2011年第1期25卷 123-131页

作者：黄虎张社荣 North China University of Water Resources and Electric Power College of Civil Engineering Tianjin University

tension leg platform （TLP） for offshore wind turbine support is a new type structure in wind energy utilization. The strong-interaction method is used in analyzing the coupled model, and the dynamic characteristics of the TLP for offshore wind turbine support are recognized. As shown by the calculated results： for the lower modes, the shapes are water＇s vibration, and the vibration of water induces the structure＇s swing; the mode shapes of the structure are complex, and can largely change among different members; the mode shapes of the platform are related to the tower＇s. The frequencies of the structure do not change much after adjusting the length of the tension cables and the depth of the platform; the TLP has good adaptability for the water depths and the environment loads. The change of the size and parameters of TLP can improve the dynamic characteristics, which can reduce the vibration of the TLP caused by the loads. Through the vibration analysis, the natural vibration frequencies of TLP can be distinguished from the frequencies of condition loads, and thus the resonance vibration can be avoided, therefore the offshore wind turbine can work normally in the complex conditions.

关键词： offshore wind turbine tension leg platform fluid structure interaction dynamic characteristics yaw resonance vibration

A Stability Criterion for Time-Delay tension leg platform Systems Subjected to External Force

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2009年第1期23卷 49-57页

作者： Chen-Yuan CHEN Chien-wen SHEN Cheng-Wu CHEN Kevin Fong-Rey LIU Ming-Jen CHENG Department of Management Information System Yung- Ta Institute of Technology and Commerce Ping-Tung County 90941 China Department of logistics Management National Kaohsiung First University of Science and Technalgy Kaohsiung City 811 China Department of Logistics Management Shu- Te University Kaohsiung 82445 China Graduate Institute of Management National Kaohsiung First University of Science and Technolgy Kaohsiung City 811 China Department of Safety Health and Environmental Engineering Ming Chi University of Technology Taipei 24301 China

Stability analysis plays a central role in nonlinear system theory and engineering application. Over the past few years, the stability analysis of fuzzy systems has been proposed and there are many successful applications in practical engineering. Therefore, in this paper firstly proposed is the stability analysis on oceanic structure by fuzzy models. In the present study, Takagi-Sugeno （T-S） fuzzy model is proposed for a time delay tension leg platform （TLP） system subjected to an external wave force. In terms of stability analysis, linear matrix inequality （LMI） conditions are derived via Lyapunov theory to guarantee the stability of the TLP system.

关键词： linear matrix inequality tension leg platform fuzzy model

Application of tension leg platform Combined with Other Systemsin the Development of China Deepwater Oil Fields

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2006年第4期20卷 517-528页

作者：张大刚 Deepwater Engineering and Technology Research Center Harbin Engineering University

The development of deepwater oil fields has reached a new stage with the dramatic increase in water depth and the recent increasing demands of the economic development in the filed. The use of a tension leg platform （TIP） combined with other systems, such as Floating Production Storage and Offloading （FPSO） system, Floating Production Unit （FPU） system, Tender Assisted Drilling （TAD） system, etc., has drawn the industry attention and increased significantly in the past few years. For the areas lacking of pipeline system, the use of TIP（s） combined with FPSO has been chosen to efficiently develop the deepwater fields. The TIP with a Tender Assisted Drilling system significantly reduces the payload of the platform and reduces the investment in the TIP system substantially. This opens the door for many new deepwater field developments to use the tension leg platform. The advantage of the TIP combined with a TAD system is more significant when several TIPs are used for the continuous development of the field. One of the applications for the TIP with a tender assisted drilling system can be in the development of an offshore marginal field. Owing to the increase of water depth, the conventional fixed platform model for the exploration of those fields becomes uneconomical. It also would be too expensive to use a large TIP structure for those marginal fields due to the large amount of initial investment. The TIP system with tender assisted drilling can be used to develop those fields economically. There are many marginal fields in China offshore, especially in shelf areas. The application of this field developing model, combined with the existing field developing experience in China, will open the door for many marginal field developments. This paper will review the application of the combined TIP system through some examples of completed/ongoing projects, and major technical issues encountered in those practices. The potential application of this technology in China deep

关键词： tension leg platform combined system tender assisted drilling platform structure field development deepwater

tension leg platform project execution

在线全文

学校读者我要写书评

暂无评论

Engineering Sciences 2013年第4期11卷 79-85页

作者： Zhang Dagang Wang Chunsheng Zhang Tianyu DMAR Engineering Inc. China National offshore Oil Corporation (CNOOC) Research Institute

The first floating platform concept design work for South China Sea is undergoing in DMAR's office now. This tension leg platform has potential to become the first advanced floating production platform project. Project execution is always a challenge for floating system. This paper focuses on the critical elements of project execution for tension leg platform,and studies potential implications to future oil and gas exploration in South China Sea. There are many factors affecting successful execution of floating system project,including technical issues, engineering management,interface management,etc. There are also failure examples of project execution in the industry. The author has participated 28 large detailed projects and has gained extensive experience on floating projects,with ample hands-on project experiences. A detailed tension leg platform project study example and discussions in depth are presented for future project execution in China deepwater development.

关键词： project execution deepwater project tension leg platform floating system project management

Response-based Analysis for tension leg platform

在线全文

学校读者我要写书评

暂无评论

Journal of Marine Science and Application 2017年第1期16卷 87-92页

作者： Yongjun Chen Dagang Zhang DMAR Engineering Inc. Houston Texas 77094 USA

The typical industry practice for tension leg platform （TLP） design focuses on a conventional short-term design recipe, which assumes that an N-year design environment leads to an N-year response. In the response-based design method, the TLP is designed to withstand N-year responses rather than respond to N-year environmental conditions. In this paper, we present an overview and a general procedure for the response-based design method and use a case study to compare the critical TLP responses between the two methods. The results of our comparison show that the conventional short-term design method often contains an element of conservatism and that the response-based design method can reduce the design conditions and thereby achieve cost savings.

关键词： response-based design long-term response short-term response deepwater floating platform tension leg platform