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Flutter Frontier

机译：颤振前沿

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摘要

Flutter is the most dreaded word in the aerodynamicists' lexicon, but a team of flight-test engineers are poised to fly an experimental aircraft that is designed to help tame this dangerous phenomenon. The rewards, if they are successful, could be huge. From aviation's earliest days, designers have coped with flutter by adding margin to the aircraft structure. While this approach stiffens the airframe and prevents potentially catastrophic coupling with aerodynamic forces, it also adds weight and necessarily limits the configuration and efficiency of the design. The Lockheed Martin Skunk Works-built X-56A will be flown in coming months as part of efforts to show that this flutter barrier can be overcome, opening up previously unexplored design space for future aircraft with lighter, more efficient high-aspect-ratio wings. Dubbed the Multi-Utility Technology Testbed (MUTT), the 28-ft.-span unmanned aircraft is designed to represent such a future vehicle; it incorporates long wings that on current aircraft would be considered impossibly slender and flexible.
机译：Flutter是空气动力学专家词典中最令人恐惧的词，但是一组飞行测试工程师准备驾驶一架旨在帮助驯服这种危险现象的实验飞机。如果成功的话，回报可能是巨大的。从航空的早期开始，设计师就通过增加飞机结构的边缘来应对抖动。尽管这种方法使机身变硬，并防止了与空气动力的潜在灾难性耦合，但它也增加了重量，并必然限制了设计的结构和效率。洛克希德·马丁公司臭鼬工厂制造的X-56A飞机将在未来数月内试飞，这是努力证明可以克服这一扑动障碍的一部分，它将为未来的飞机提供更轻，更高效的高纵横比机翼开辟以前未曾探索过的设计空间。 。 28英尺跨距的无人驾驶飞机被称为多用途技术测试平台（MUTT），旨在代表这种未来的飞行器。它包含了长机翼，这在目前的飞机上将被认为是纤细而灵活的。

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