Control of gaps in technical structures during ground vibration testing

OBRABOTKAMETALLOV MATERIAL SCIENCE Том 20 № 3 2018 EQUIPMEN . INSTRUM TS Vol. 3 No. 2 2021 Ta b l e 1 Detecting the backlash No sensor 1 2 3 4 5 6 7 8 ξ 10.42 8.82 5.99 26.28 9.83 101.62 59.67 43.64 Ta b l e 2 Calculating the sizes of the backlashes No node 3 3 3 4 4 6 6 3, 6 True backlash, μm 50.0 43.0 20.0 50.0 35.0 50.0 35.0 30+50 Calculated backlash, μm 46.5 49.0 22.0 52.6 38.3 47.3 35.3 74.0 Fig. 6 . Gaps in attachment points of a forewing. The global normalization of the distortions at the rotating frequency of the forewing. Figures 6–11 illustrate the distortion distributions of the portraits of oscillations which were computed throughout the GVT of several airplanes. In the figures the upper limit of the color scale corresponds to the fields contained the maxima of the distortions and the lower end – to the parts where the magnitudes are the smallest. Fig. 7 . The global normalization of the distortions at the rotating frequency of the stabilator