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Modal Test and Analysis of the NASA Tiltrotor Test Rig

机译:NASA泰尔特洛特试验台的模态测试与分析

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The Tiltrotor Test Rig (TTR) is being developed at the NASA Ames Research Center for testing full-scale proprotors in the National Full-scale Aerodynamics Complex (NFAC) wind tunnel. The TTR is currently undergoing checkout testing to ensure its proper functionality. Part of the checkout process is a ground vibration test, or shake test, to characterize the modal characteristics of the test rig once it is installed in the wind tunnel. This paper presents a summary of the shake test procedure and an overview of the test results. The results include frequency response functions for a number of different test configurations as well as visualizations of the major mode shapes. Excitation methods included random and swept sine shaking as well as hammer impacts. At the conclusion of this paper, some recommendations are given for future shake tests.
机译:在NASA AMES研究中心开发了TiltrotOR测试钻机(TTR),用于测试全国全规模空气动力学复合体(NFAC)风洞的全规模血统的研究中心。 TTR目前正在接受结账测试以确保其适当的功能。结帐过程的一部分是一个地面振动测试或抖动测试,以表征测试装置的模态特性,一旦安装在风洞中。本文介绍了抖动测试程序的摘要和测试结果的概述。结果包括多个不同测试配置的频率响应函数以及主要模式形状的可视化。激励方法包括随机和扫过正弦振动以及锤击撞击。在本文的结论结束时,还提供了一些建议,以便进行未来的震动测试。

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