Crashworthiness uncertainty analysis of typical civil aircraft based on Box–Behnken method

Abstract The crashworthiness is an important design factor of civil aircraft related with the safety of occupant during impact accident. It is a highly nonlinear transient dynamic problem and may be greatly influenced by the uncertainty factors. Crashworthiness uncertainty analysis is conducted to investigate the effects of initial conditions, structural dimensions and material properties. Simplified finite element model is built based on the geometrical model and basic physics phenomenon. Box–Behnken sampling and response surface methods are adopted to obtain gradient information. Results show that the proposed methods are effective for crashworthiness uncertainty analysis. Yield stress, frame thickness, impact velocity and angle have great influence on the failure behavior, and yield stress and frame thickness dominate the uncertainty of internal energy. Failure strain and tangent modulus have the smallest influence on the initial peak acceleration, and gradients of mean acceleration increase because the appearance of material plastic deformation and element failure.

[1]  K. H. Lyle,et al.  Crash Certification by Analysis - Are We There Yet? , 2006 .

[2]  J. D. Cronkhite,et al.  Crashworthy airframe design concepts: Fabrication and testing , 1982 .

[3]  Jinwu Xiang,et al.  The crashworthiness of civil aircraft using different quadrangular tubes as cabin-floor struts , 2011 .

[4]  Karen H. Lyle,et al.  Data Reduction and Its Impact on Test-Analysis Correlation , 2001 .

[5]  Jinwu Xiang,et al.  Crashworthiness design of transport aircraft subfloor using polymer foams , 2011 .

[6]  Jinwu Xiang,et al.  A comparative study of the crashworthiness of civil aircraft with different strut configurations , 2010 .

[7]  Mu Rangke.  Correlation Study of Crash Analysis and Test of Civil Airplane Sub-cabin Energy Absorption Structure , 2012 .

[8]  Edwin L. Fasanella,et al.  NASA Langley Research Center impact dynamics research facility research survey , 2004 .

[9]  Lucas G. Horta,et al.  Multi-Dimensional Calibration of Impact Dynamic Models , 2011 .

[10]  Baodong Guo,et al.  Effect of pitch angle on initial stage of a transport airplane ditching , 2013 .

[11]  Hua Liu,et al.  Simulation and Analysis of Crashworthiness of Fuel Tank for Helicopters , 2007 .

[12]  Haym Benaroya,et al.  Investigation of Monte Carlo simulation in FAA program KRASH , 1994 .

[13]  Lucas G. Horta,et al.  Development and Calibration of a System-Integrated Rotorcraft Finite Element Model for Impact Scenarios , 2012 .

[14]  ERRORS AND UNCERTAINTIES IN PROBABILISTIC ENGINEERING ANALYSIS , 2001 .

[15]  S M R Hashemi,et al.  A systematic approach to aircraft crashworthiness and impact surface material models , 2000 .

[16]  Sean P. Kenny,et al.  Needs and Opportunities for Uncertainty- Based Multidisciplinary Design Methods for Aerospace Vehicles , 2002 .

[17]  Sharon L. Padula,et al.  APPLICATION OF PROBABILISTIC ANALYSIS TO AIRCRAFT IMPACT DYNAMICS , 2003 .

[18]  Karen H. Lyle,et al.  Application of Probability Methods to Assess Airframe Crash Modeling Uncertainty , 2007 .

[19]  Lucas G. Horta,et al.  A computational approach for probabilistic analysis of water impact simulations , 2010 .