This SAE Aerospace Recommended Practice (ARP) defines a means of assessing the credibility of computer models of aircraft seating systems used to simulate dynamic impact conditions set forth in Federal Regulations 14 CFR Part 23.562, 25.562, 27.562, and 29.562. The ARP is applicable to lumped mass and detailed finite element seat models. This includes specifications and performance criteria for aviation specific virtual anthropomorphic test devices (v-ATDs). A methodology to evaluate the degree of correlation between a seat model and dynamic impact tests is recommended. This ARP also provides testing and modeling best practices specific to support the implementation of analytical models of aircraft seat systems. Supporting information within this document includes procedures for the quantitative comparison of test and simulation results, as well as test reports for data generated to support the development of v-ATDs and a sample report. For this revision, Section 4, Seat System Validation is held in reserve.
Analytical modeling tools have been developed to facilitate design and dynamic evaluation of aircraft seating systems. A principal goal of these modeling efforts is to use the model to accurately predict the results of a physical test. An accurate model could potentially be used to evaluate the seating system in lieu of physical test, saving both development time and cost. A means of establishing confidence in this predictive ability is needed. Towards that end, this document has been developed to define specifications for numerical ATD (Anthropometric Test Device) models suitable for aviation impact test simulations, provide procedures for validation of both lumped mass and detailed finite element seat models, and convey the current best practices to assist engineering analysts in developing efficient, accurate models.