Pierre Granger

This mission aims to maintain, improve, and redeploy all functionalities of about fifteen calculation software packages (developed in Visual Basic 6 and FORTRAN) used for radioactivity measurement by IRSN during the various control missions it carries out.

These software packages are Windows applications responsible for interfacing with measurement tools (gamma and neutron spectrometry) as well as automatic analysis and exploitation of results to identify the presence or absence of different radioactive materials (particularly Uranium and Plutonium) and, if necessary, to establish the isotopic composition and the masses involved.

Development (in FORTRAN and VISUAL BASIC) within Dassault Aviation's finite element calculation software for modeling private jets and fighter aircraft.

My main contributions were:

- Optimization algorithm (Newton-Raphson) to mechanically balance an aircraft in flight, taking into account its aerodynamic flexibility.

- Engine thrust control algorithm to maintain its dynamic behavior (in flight or on the ground).

- Modifications and updates of routines to improve performance, complexity, and fix certain bugs.

- Addition of hydromechanical elements to model a hydraulic damper system present on landing gear.

- Incompressible element to model the behavior of tires and the entire landing gear system during takeoffs, landings, and instability events like shimmy.

Development of batch processes (in Fortran) to automate the creation of elements in the ANSYS finite element calculation software for modeling ball bearings.