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Development of a multibody system for crashworthiness certification of aircraft seat

机译：开发飞机座椅Crashwortness认证的多体系

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摘要

This work proposes a multibody approach in the simulation of 16-g aircraft seats, referred to the front-row of seats located behind bulkheads compliance with the Head Injury Criteria (HIC) requirement. The multibody model of the seat structure has been developed and analysed by using a home-made algorithm implemented in Matlab_(?)code, as a 2D system of rigid bodies interconnected by springs and joints. The research has been oriented to assess the capability of simulating a 16g frontal impact of a sled equipped with the seat of a regional aircraft on which an anthropomorphic dummy is arranged. This sled test, for which experimental data were available, has been used as test case; inertial and structural properties of the system have also been experimentally and numerically evaluated in order to make the numerical model compliant with the real one. One of the primary goals of the paper is to provide an intuitive, easily extendable numerical tool to support designers in multibody simulation and to define a tool able to obtain global sled-test results in very short time, especially if compared to the computational time of a detailed finite element simulation. This tool will allow running sensitivity analysis and first level optimisation of key design parameters, integrating itself in the design cycle, not in place of, but as a support to the main simulation tools.
机译：这项工作提出了一种仿真在16克飞机座椅中的多体方法，提到了位于舱壁符合头部损伤标准（HIC）要求的隔板上的前排座位。通过使用MATLAB _（α）代码中实现的自制算法，作为由弹簧和接头互连的刚性体的2D系统开发和分析了座椅结构的多体模型。该研究已定向为评估模拟配备有区域飞机座椅的16G正面影响的能力，该雪橇被安排了一个拟人假设的区域飞机。该橇试验，可获得实验数据，已被用作测试用例;系统的惯性和结构性质也已经在实验上和数值上进行了评估，以便使数值模型符合真实的。本文的主要目标之一是提供直观，易于可扩展的数字工具，以支持多体仿真中的设计者，并定义能够在非常短的时间内获得全局滑雪测试结果的工具，特别是如果与计算时间相比详细的有限元模拟。此工具将允许运行灵敏度分析和关键设计参数的第一级优化，在设计周期中集成在设计周期中，而不是代替，而是作为主模拟工具的支持。

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