<?xml version="1.0" encoding="UTF-8"?> <article key="pdf/10007949" mdate="2017-08-02 00:00:00"> <author>Yu Li and Jingwu He and Yuexi Xiong</author> <title>Layout Design Optimization of Spars under Multiple Load Cases of the HighAspectRatio Wing</title> <pages>1630 - 1634</pages> <year>2017</year> <volume>11</volume> <number>10</number> <journal>International Journal of Aerospace and Mechanical Engineering</journal> <ee>https://publications.waset.org/10007949.pdf</ee> <url>https://publications.waset.org/vol/130</url> <publisher>World Academy of Science, Engineering and Technology</publisher> <abstract>The spar layout will affect the wing&amp;amp;rsquo;s stiffness characteristics, and irrational spar arrangement will reduce the overall bending and twisting resistance capacity of the wing. In this paper, the active structural stiffness design theory is used to match the stiffnesscenter axis position and loadcases under the corresponding multiple flight conditions, in order to achieve better stiffness properties of the wing. The combination of active stiffness method and principle of stiffness distribution is proved to be reasonable supplying an initial reference for wing designing. The optimized layout of spars is eventually obtained, and the highaspectratio wing will have better stiffness characteristics. </abstract> <index>Open Science Index 130, 2017</index> </article>