Includes mathematical modelling , simulation , code development , rotordynamic analysis , rotor balancing , rotor design ( lateral modes , torsional modes including critical speeds and mode shapes , steady response , stability map , antifriction bearing dynamic coefficient estimation , single plane balancing , two plane balancing by influence coefficient method , multiplane balancing by influence coefficient method , modal balancing of flexible rotors , rotordynamic simulation code development using QZ algorithm , design of static and dynamic components using FEM )+ innovation and R&D.( invention of inertial propulsion system , design of tuned boring bar etc. )