Whole-aircraft dynamic model main gear designing method and simplified structure

Abstract

The invention relates to a whole-aircraft dynamic model main gear designing method, comprising the steps of first, acquiring design dimensions of a whole-aircraft dynamic model main gear at predetermined scale according to dimensions of a true main gear; second, acquiring a force transmission structure of the model main gear according to a force transmission structure of the true main gear, and simulate-calculating physical properties of the simplified main gear force transmission structure; third, fitting according to performance parameters of hydraulic dampers and tires in the true main gear to obtain spring stiffness coefficient and tire performance parameters in the main gear simplified structure; fourth, re-calculating dimensions of springs and tires according to the physical properties of step two and the spring stiffness coefficient and tire performance parameters of step three; fifth, iteratively optimizing to obtain optimal dimensions of the whole-aircraft dynamic model main gear. The whole-aircraft dynamic model main gear designing method provides full guarantee on force transmission structure and force transmission characteristics and enables the design to meet dynamic test requirements.

Description

technical field [0001] The invention belongs to the technical field of aircraft structure strength tests, and in particular relates to a method for designing a main landing gear of a dynamic model of the whole aircraft and a simplified structure. Background technique [0002] The main landing gear is the medium between the aircraft and the ground. In the previous dynamic model design, the main landing gear buffer design has the following methods: [0003] (1) The design of the main landing gear of the model is exactly the same as that of the real aircraft. This kind of main landing gear buffer is expensive and complex in structure; at the same time, due to the limited size and space of the main landing gear of the model, the processing requirements are extremely high; [0004] (2) The main landing gear of the model is a combination of a single rod and a tire, without a buffer part. In the test, the main landing gear only provides support and cannot meet the requirements of t...

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Problems solved by technology

[0003] (1) The design of the main landing gear of the model is exactly the same as that of the real aircraft. This kind of main landing gear buffer is expensive and complex in structure; at the same time, due to the limited size and space of the main landing gear of the model, the processing requirements are extremely high;

[0004] (2) The main landing gear of the model is a combination of a single rod and a tire, without a buffer part. In the test, the main landing gear only provides support and cannot meet the requirements of the mechanical performance curve in the test

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