Experimental Program for the Development of Improved Helicopter Structural Crashworthiness Analytical and Design Techniques. Volume 1. Computerized Unsymmetrical Mathematical Simulation and Experimental Verification for Helicopter Crashworthiness in which Multidirectional Impact Forces are Present
Abstract
The results of a four-phase study to develop helicopter structural crashworthiness analytical and design techniques are presented. The study consisted of the development of a computer program (KRASH) and the verification of a mathematical model to predict the dynamic response during a survivable accident in which combined vertical and lateral impact velocities are present. Included in the study were a literature survey and evaluation, a detailed analysis of 32 accident cases, a drop test of a UH-1H helicopter with ground impact conditions of 23 fps vertical velocity and 18.6 fps lateral velocity, and parameter studies. It is concluded that program KRASH is capable of accurately predicting the dynamic responses during a multi-directional accident and that the program is a valuable tool with which to perform design tradeoff studies.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1973
- Accession Number
- AD0764985
Entities
People
- Gilbert Wittlin
- Max A. Gamon
Organizations
- Lockheed Martin