IGF::OT::IGF LASER - BOUNDARY ELEMENT ANALYSIS OF COMMERCIAL CREW. COMMERCIAL CREW DEVELOPMENT (CCDEV) IS A MULTIPHASE SPACE TECHNOLOGY DEVELOPMENT PROGRAM, FUNDED BY THE U.S. GOVERNMENT, AND ADMINISTERED BY NASA. THE PROGRAM IS INTENDED TO STIMULATE DEVELOPMENT OF PRIVATELY OPERATED CREW VEHICLES TO LOW EARTH ORBIT. THE OBJECTIVES OF THE COMMERCIAL CREW&CARGO PROGRAM ARE TO IMPLEMENT U.S. SPACE EXPLORATION POLICY WITH INVESTMENTS TO STIMULATE THE COMMERCIAL SPACE INDUSTRY FACILITATE U.S. PRIVATE INDUSTRY DEMONSTRATION OR CARGO AND CREW SPACE TRANSPORTATION CAPABILITIES WITH THE GOAL OF ACHIEVING SAFE, RELIABLE, COST EFFECTIVE ACCESS TO LOW-EARTH ORBIT AND CREATE A MARKET ENVIRONMENT IN WHICH COMMERCIAL SPACE TRANSPORTATION SERVICES ARE AVAILABLE TO GOVERNMENT AND PRIVATE SECTOR CUSTOMERS. THE COMMERCIAL CREW (CC) VEHICLE WILL EXPERIENCE SEVERAL FLIGHT PHASES, I.E. LIFTOFF TO LANDING. AS PART OF THE INTEGRATED ANALYSES OF THIS VEHICLE, IT IS NECESSARY TO DEVELOP THE VIBROACOUSTIC ENVELOPS BASED ON THE EXTERNAL ACOUSTICS FROM EVENTS SUCH AS LIFTOFF AND INTERNAL STRUCTURE BORNE EMANATING FROM THE LAUNCH VEHICLE MOTORS. A PORTION OF THESE ENVELOPS AT MID FREQUENCY (0HZ TO 250HZ) SHOULD BE DETERMINED USING THE BOUNDARY ELEMENT ANALYSIS (BEA) METHODS.