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纺锤形Tensairity结构基本力学性能研究 被引量:6
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作者 曹正罡 张雄迪 +1 位作者 范峰 孙瑛 《土木工程学报》 EI CSCD 北大核心 2011年第1期11-18,共8页
Tensairity结构体系在我国尚未应用。为掌握Tensairity的有限元分析方法和基本力学性能,利用ANSYS软件构建了纺锤形Tensairity结构的精细化有限元模型,实现了结构从初始态到受荷态的全过程分析。与国外学者开展的试验进行数值模拟,结果... Tensairity结构体系在我国尚未应用。为掌握Tensairity的有限元分析方法和基本力学性能,利用ANSYS软件构建了纺锤形Tensairity结构的精细化有限元模型,实现了结构从初始态到受荷态的全过程分析。与国外学者开展的试验进行数值模拟,结果吻合较好。在此基础上,开展了集中荷载作用下,内气压、构件截面、膜材刚度等参数对Tensairity结构受力性能的影响规律研究。结果显示,Tensairity受力特点是通过上下弦构件间的轴向力偶来抵抗外荷载,实现了结构受力拉压分离的设计思想。提高初始内气压、增大上下弦构件截面和提高跨径比是增加结构整体刚度的有效手段;工程实践中应采取措施保证气肋与上下弦构件的有效连接,避免气肋侧向翻转而导致结构失效;同时应保证气肋的密闭性和内气压稳定性。 展开更多
关键词 tensairity 张弦结构 气肋 有限元
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Pressure induced stability: from pneumatic structures to Tensairity~ 被引量:7
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作者 Rolf H. Luchsinger Mauro Pedretti Andreas Reinhard 《Journal of Bionic Engineering》 SCIE EI CSCD 2004年第3期141-148,共5页
Structural stabilization by a pressurized fluid is very common in nature, however hardly found in technology. Car tires, hot air balloons, airships and airhouses are among the few technical exceptions, which are stab... Structural stabilization by a pressurized fluid is very common in nature, however hardly found in technology. Car tires, hot air balloons, airships and airhouses are among the few technical exceptions, which are stabilized by a compressed medium, typically air. Restricted by simple geometries and a very limited load bearing capacity these pneumatic structures could succeed only in very specialized applications. Nevertheless, prospective concepts ag has systematically investigated pneumatic structures during the last few years. As a major result, it was demonstrated that almost any shape can be made with pneumatic structures and that astonishing structures such as the pneumatic airplane Stingray can be realized even with low air pressure. On top of that, Airlight Ltd. in close collaboration with prospective concepts ag has recently developed the fundamental new structural concept Tensairity. The synergetic combination of an inflated structure with conventional structural elements such as cables and struts yields pneumatic light-weight structures with the load bearing capacity of steel girders. Thus, complex forms and high strength open up many new opportunities for pressure induced stability in technology. An overview of these recent developments is presented and the close relationship of pneumatic structures with biology is outlined. 展开更多
关键词 pneumatic structures tensairity web technology AVIATION self-repairing membrane
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Review of tensairity and its applications in agricultural aviation 被引量:1
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作者 Zang Ying Gu Xiuyan +5 位作者 Zhou Zhiyan Luo Xiwen Zang Yu Qi Xingyuan Liu Wulan Yang Cheng 《International Journal of Agricultural and Biological Engineering》 SCIE EI CAS 2016年第3期1-14,共14页
In recent years,the unmanned aerial vehicle(UAV)has undergone rapid development in field of agricultural plant protection;however,the payload and max-endurance are bottlenecks that limit its further development.Tensai... In recent years,the unmanned aerial vehicle(UAV)has undergone rapid development in field of agricultural plant protection;however,the payload and max-endurance are bottlenecks that limit its further development.Tensairity is a new structure consisting of a bag filled with low-pressure gas,an upper rigid rod and a lower flexible cable.It puts tension pressure on the whole structure through internal gas pressure,provides continuous support to the upper rigid rod,and that is to say,the tensairity improves the stability of the structure in some way.And also,tensairity is a self-supporting and self-balancing system,which means it is a simple,lightweight structure with small storage volume,strong bearing capacity,and low engineering cost.It also has the advantages of gasbag and BSS(beam string structure).The main objective of this research was to introduce the theoretical basis of tensairity and then discussed its development and applications.Moreover,the advantages and disadvantages of tensairity were summarized,and development prospects of tensairity in agricultural aviation were presented.At last,it can be concluded that tensairity has potentials in agricultural aviation.If tensairity is applied in agricultural UAVs,it will solve the two major problems of payload and max-endurance better,and help promoting the development of agricultural aviation technology in agricultural aviation administration and application.Also,it will help with meeting the aerial application requirements of high efficiency and maximal environmental protection.This research will provide a reference for improving working efficiency and economic benefits of UAVs in agricultural plant protection. 展开更多
关键词 tensairity agricultural aviation unmanned aerial vehicle(UAV) BIONICS numerical simulation PAYLOAD
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Plants as concept generators for biomimetic light-weight structures with variable stiffness and self-repair mechanisms 被引量:11
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作者 Thomas Speck Tom Masselter +3 位作者 Bettina Prim Olga Speck Rolf Luchsinger Siegfried Fink 《Journal of Bionic Engineering》 SCIE EI CSCD 2004年第4期199-205,共7页
Plants possess many structural and functional properties that have a high potential to serve as concept generators for the production of biomimetic technical materials and structures. We present data on two features... Plants possess many structural and functional properties that have a high potential to serve as concept generators for the production of biomimetic technical materials and structures. We present data on two features of plants (variable stiffness due to pressure changes in cellular structures and rapid self-repair functions) that may be used as models for biomimetic projects. 展开更多
关键词 BIONICS biomimetics SELF-REPAIR pneumatic structures tensairity ARISTOLOCHIA
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