The use of Gauss-Laguerre integration, with offset of the layer origins, and part inversion in the solution of the matrix equations also improve efficiency.
#BACKCALCULATION MODULUS 6.0 CODE#
A code fragment is presented to illustrate the structure of the program loops. This makes the computation time only very weakly dependent on the number of layers and the number of aircraft when all of the structure and aircraft information is passed to the program before execution. Efficiency has been improved by structuring the program loops so that redundant computations are eliminated for multiple aircraft on a multiple-layered structure. Wheel loads are modeled as circular loads with constant vertical pressure. Major objectives in writing the new program were to improve the efficiency of the computation of linear elastic pavement responses in the LEDFAA thickness design program and to provide a well-documented methodology and implementation suitable for further development when necessary. It can therefore be executed from programs written in other languages compiled for execution under Windows.
#BACKCALCULATION MODULUS 6.0 WINDOWS#
The program is written in Visual Basic (VB) 6.0 for Microsoft Windows 95, or higher, as a Dynamic Link Library with a defined interface. CC2 Test Items (Main Experiment) DatabaseĬomputer Applications to Airport Pavements LEAF – A New Layered Elastic Computational Program for FAA Pavement Design and Evaluation ProceduresĪ new computer program implementation of the layered elastic response equations has been written for use in Federal Aviation Administration (FAA) airport pavement design and evaluation computer programs.Pavement Materials Laboratory Capabilities.Industry Trends Impact Pavement Testing.National Airport Pavement & Materials Research Center.National Airport Pavement Test Facility.
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