This study aims to assess the vibrational behavior of a large transport airship based on finite element (FE) simulation and modal testing of its scaled model.
A full-size parametric FE model of the airframe was established according to the structural layout of the composite beam-cable airframe of the airship, and vibrational analysis of the airframe was conducted. The influence of cable pre-tension load on the inherent properties of the airframe was investigated. Based on the simplification of the full-size FE model, scaled numerical and test models of the airframe, with a geometric scale factor of 1:50, were established and built.
The simulation and test results of the scaled models indicated that the mode shapes of the full-size and scaled models were similar. The natural frequencies of both the full-size and scaled models complied with the theoretical similarity relation of the frequency response.
This study demonstrated that the vibrational test results of the scaled model with very large scaling can be used to characterize the modal properties of the beam-cable airframe of a large transport airship.
Characterizing vibrational behavior of a large airship based on scaled model test and analysis
Aircraft Engineering and Aerospace Technology ; 95 , 4 ; 668-683
2022-11-24
16 pages
Article (Journal)
Electronic Resource
English
NTRS | 1921
|Engineering Index Backfile | 1921
|Field of large commercial airship
Engineering Index Backfile | 1936
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