|Last updated:||15 April 2012|
|File size:||1.53 MB|
|Publisher:||Federal Aviation Administration|
Publisher description for BAKFAA
BAKFAA performs backcalculation of pavement layer modulus values using the FAA layered elastic analysis program LEAF and a downhill multidimensional simplex minimization method. The function minimized is the sum of the squares of the differences between vertical pavement surface deflections measured with a falling weight deflectometer (FWD) and vertical pavement surface deflections computed with the layered elastic program.