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| Configuration design and analysis of helicopter crashworthiness components |
| LU Zhilong |
| China Helicopter Research and Design Institute, Jingdezhen 333000, China |
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Abstract In order to explore influence of different configuration parameters on a energy absorption performance of composite corrugated beams, the dynamic collapse tests were carried out for various configurations of corrugated beams, and the load-time curves and failure modes of various configurations of corrugated beams were given by analyzing the test phenomena and processing the test data. The transient impact process of the corrugated beam was simulated by the finite element software (ABAQUS), and the specific energy absorption (SEA) and the average load value were obtained, which were compared with the experimental results to verify the validity of the numerical model. Based on the experimental and numerical analysis results, the influence of the corrugated configuration on the peak load and energy absorption capacity of the corrugated beam is discussed, and the difference of energy absorption between different corrugated beams and the design of adding weak links is evaluated, which provides a reference for practical engineering design.The results indicate that when the critical stress equation of the corrugated beam under axial compressive load is used to set the height/amplitude ratio and wavelength/amplitude ratio of the corrugated beam in the corresponding relationship, the corrugated beam structure exhibits a relatively stable crushing process, which has certain application value;The R value of the corrugated web fillet not only affects the peak load and average load, but also has a certain relationship with the change of the failure mode of the corrugated beam. The R value of the weak fillet can better improve the peak load.
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Received: 28 January 2023
Published: 15 April 2024
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