The invention discloses a nonlinear bending and forced vibration analysis method for a post-buckling aircraft fluid conveying pipe, and belongs to the technical field of mechanical property analysis of aircraft fluid conveying pipes. The method comprises the following steps: establishing a static dynamic model of the flow-induced post-buckling aircraft flow conveying pipe; a two-step perturbation technology is expanded to a post-buckling equilibrium path, and an initial configuration is provided for bending and resonance analysis; according to the two symmetrical initial bifurcation paths, the two-step perturbation method is adopted again to obtain the bending load-deflection explicit relation; according to the method, a two-step perturbation method and an improved LINDSTED-Poincare method are combined, and an approximate analytical solution of strong nonlinear forced vibration is obtained. According to the method, the nonlinear static dynamic structure design of the aircraft fluid conveying pipe under the combined action of internal fluid flow induced deformation and external loads can be guided.
本发明公开了一种后屈曲飞机输流管的非线性弯曲和强迫振动分析方法,属于飞机输流管力学性能分析技术领域。该方法包括:建立流致后屈曲飞机输流管的静动力学模型;将两步摄动技术扩展到后屈曲的平衡路径,为弯曲和共振分析提供了初始构型;根据两个对称初始分岔路径,再次采用两步摄动法得到弯曲载荷‑挠度显式关系;采用两步摄动法和改进的Lindstedt‑Poincaré法相结合的方法,得到了强非线性强迫振动的近似解析解。本发明可指导飞机输流管在内部流体流动诱导变形和外部载荷共同作用下的非线性静动力学结构设计。
Non-linear bending and forced vibration analysis method for post-buckling aircraft fluid conveying pipe
一种后屈曲飞机输流管的非线性弯曲和强迫振动分析方法
2025-02-18
Patent
Electronic Resource
Chinese
IPC: | G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung / B64F GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT , Boden- oder Flugzeugträgerdeckeinrichtungen besonders ausgebildet für die Verwendung in Verbindung mit Luftfahrzeugen |
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