Research on Dynamic Characteristics of Aircraft with Floating Material

Abstract

This paper establishes a simplified aircraft with floating material, and conducts modal analysis and random vibration analysis. The purpose is to analyze the influence of floating material on the inherent characteristics of aircraft, and the number of detection rods and the metal shell on the inherent characteristics of aircraft with floating material. The results show that the floating material can make the low order frequencies of the aircraft more intensive. The aircraft will be more likely to resonate, and the weak part of the aircraft will change. The more the number of detection rods, the denser the low order frequencies, and the easier it is to see the resonance frequency of the aircraft. The influence of metal shell on aircraft is to increase the frequency of the same order and increase the stiffness of the whole model. The calculation results of the response points basically correspond to the modal calculation results of the aircraft. It can prove that the establishment and setting of the aircraft are correct, and the whole process can effectively analyze the random vibration of aircraft with floating material. The results of modal analysis can be used in engineering practice to prevent resonance, and provide a reference for the test.