Numerical Tests of the Virtual Human Model Response Under Dynamic Load Conditions Defined in Federal Aviation Regulation Part 23.562 and 25.562 – Preliminary Study

Abstract

The main aim of the presented research was to check mechanical response of human body model under loads that can occur during airplane accidents and compare results of analysis with some results of experimental tests described in literature. In simulations, new multi-purpose human body model, the VIRTHUMAN, was used. The whole model, as well as its particular segments, was earlier validated based on experimental data, which proved its accuracy to simulate human body dynamic response under condition typical for car crashes, but it was not validated for loads with predominant vertical component (loads acting along spinal column), typical for airplane crashes. Due to limitation of available experimental data, the authors focused on conducting calculations for the case introduced in 14 CFR: Parts 23.562 and 25.562, paragraph (b)(1), knowing as the 60 • pitch test. The analysis consists in comparison of compression load measured in lumbar section of spine of the FAA HIII Dummy (experimental model) and in the Virthuman (numerical model). The performed analyses show numerical stability of the model and satisfactory agreement between experimental data and simulated Virthuman responses. In that sense, the Virthuman model, although originally developed for automotive analyses, shows also great potential to become valuable tool for applications in aviation crashworthiness and safety analyses, as well.

Assessment of Nanobag as a New Safety System in the Frontal Sled Test

“…The Virthuman model was validated against a large set of validation tests. The fullbody tests for various traffic scenarios [16][17][18] and body sizes [19,20] as well as detailed tests for the particular human body segments [11] were performed to ensure the biofidelity of the Virthuman model. This model is MBS-based using the deformable elements (virtual springs, dampers and kinematic joints with internal stiffness or breakable joints) to consider the deformability of the human body.…”

Assessment of Nanobag as a New Safety System in the Frontal Sled Test

“…The Virthuman model was validated against a large set of validation tests. The full-body tests for various traffic scenarios (Bońkowski et al, 2019, Lindstedt et al, 2016 and body sizes (Hynčík et al, 2014, Hynčík et al, 2015 as well as detailed tests for the particular human body segments (Vychytil et al, 2014) were performed to ensure the biofidelity of the Virthuman model. This model is MBS based using the deformable elements (virtual springs, dampers and kinematic joints with internal stiffness or breakable joints) to consider the deformability of the human body.…”

Virtual hybrid human body model for PTW safety assessment

“…The main advantage of the MBS method is reduced computational time. [15] The Virthuman model is validated [15] and used for prediction of injury risk in various not only road traffic scenarios [9,10,16]. For the PTW impact scenarios, the head, neck and extremities usually undergo complex multi-directional loading due to the fact that the body moves almost freely by inertia in the space.…”