Modeling and simulating method of carrier-based aircraft seat strap restraint system

Abstract

The invention discloses a modeling and simulating method of a carrier-based aircraft seat strap restraint system, and belongs to the field of aviation biomechanical simulation. Firstly, a finite element model of a seat is built by referring to a certain type of carrier-based aircraft through three-dimensional modeling software and a hybrid grid; the initial state of a Hybrid 3 type dummy model is set according to a standard posture; a hybrid safety belt mode is used, a multi-body model is used from a tensioning mechanism to the shoulder, and the finite element model is used on rest portions; then, the seat, a dummy and a strap model are combined into a human seat strap system model, a seat back inclination angle is set according to the posture in an actual carrier-based aircraft, it is assumed that the seat and the aircraft are in rigid connection, and the contact between the seat and a person and the contact between the seat and the strap are established; finally, according to the blocking carrier landing accelerated speed of the actual carrier-based aircraft, an accelerated speed curve of a bottom plate serves as an input curve of simulation analysis to be applied to the bottom of the seat and input to a calculation model for simulation calculation. The method is capable of evaluating the restraint effect of the strap system and safety risks to pilots.

Description

technical field [0001] The invention belongs to the field of aviation biomechanics simulation, and in particular relates to a modeling and simulation method for a seat belt restraint system of a shipboard aircraft. Background technique [0002] When the carrier-based aircraft lands on the deck of the aircraft carrier, the taxiing distance is short, which needs to be realized with the help of the arresting system. During the arresting landing process, a large continuous load will be generated, which will affect the pilot's physiological health and control ergonomics. Although the seat belt restraint system equipped in the cockpit of the carrier-based aircraft in active service can help to reduce the adverse effects of the arresting load on the pilot's physical health and operating efficiency, the protection effect in actual use is not ideal, and it needs to be continuously improved. system Research. [0003] At present, a large number of ground-based manned ejection experim...

AI Technical Summary

Problems solved by technology

This method is for the rigid human body, but the number of grids is too large, the calculation efficiency is very low, and the input load of the carrier-based aircraft is not considered.

[0008] Document 3: Li Mengxiao, Xiang Jinwu, Ren Yiru, etc. Evaluation and Analysis Method of Air Seat Fallability [J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(2):383-390; For the structural response characteristics of the chair in the crash environment, for the coupling system of the seat and the dummy, the finite element model of the seat was established first, and the finite element model was coupled with the 50th percentile HybridⅢ multi-rigid body dummy model. The nonlinear finite element software LS-DYNA and the multi-rigid body dynamics software Madymo carried out joint simulation, but the seat belt adopts a multi-rigid body model, which cannot accurately consider the constraints on the human body and the force of the seat belt

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