A brief description of the evolutionary development of the program KRASH to its most recent release, KRASH85, is presented, and some background is provided to delineate various program features as well as to illustrate the range of aircraft configurations and impact conditions for which the program was validated. The application of program KRASH to analyze the structural crash dynamics behavior of a narrow-body commercial jet transport aircraft used in the FAA/NASA conducted Controlled Impact Demonstration (CID) test is discussed. A description of the modeling along with comparative results between test and analyses is provided. Included in the correlation effort are acceleration time histories, sequence of impact events, fuselage crush distribution, wing and fuselage bending moment distributions, and estimates of moment and shear strength levels. The results of the transport aircraft correlation effort are used in a subsequent parametric study to formulate a crash design velocity envelope. Parametric analyses, section test and full-scale crash test results are utilized and presented in the form of acceleration time histories at the cabin floor. The transport crash design envelope, along with additional data, is used to assess the effect of aircraft size on floor acceleration pulses in a survivable crash environment. The most recent applications of KRASH are discussed.
Transport Airplane Crash Simulation, Validation and Application to Crash Design Criteria
1988
23 pages
Report
No indication
English
Transportation Safety , Air Transportation , Aircraft , Computer programs , Computerized simulation , Crash landing , Criteria , Transport aircraft , Floors , Pulses , Crushing , Impact tests , Load distribution (Forces) , Shear strength , Survival , Structural design , Program verification (Computers)
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