Intro to Mechanical Engineering（介绍机械工程）.pdf

Intro to Mechanical Engineering Mech. Eng. Top 10: ASME Survey Automobile : High-power lightweight engines, efficient mass- manufacturing Apollo: Saturn V launch vehicle (7.5 million pound thrust), command and service module, lunar excursion module Power generation: Conversion of stored energy into electricity, manipulation of chemical-, kinetic, potential-, and nuclear- energy, large-scale power production Agriculture mechanization : Powered tractors, mechanized harvesting, high-capacity irrigation pumps, computerized crops management Airplane : Propulsion (jet engines), lightweight materials, electromechanical control systems Mech. Eng. Top 10: ASME Survey Integrated circuit mass production: IC manufacturing machines, alignment systems, temperature- and vibration control, motors, bearings Air-conditioning and refrigeration: Compressors, refrigerants, heat exchangers Computer-aided engineering technology: Computer-aided design, analysis, manufacturing, virtual collaboratives Bioengineering: Imaging, prosthetics, minimally invasive surgery, tissue engineering Codes and standards: Interchangeability, interoperability, interconnectivity Mech. Eng.: Typical Program Thermo-Fluids: Heat transfer, Energy Systems, HVAC, IC Engines Mechanical Systems: Vibrations, Feedback control, Mechatronics, MEMS Design: Composites, Machine Design, FEM Core: Statics, Dynamics, Thermodynamics, Fluid mechanics, Solid mechanics Types of Motion • Linear motion – motion in a straight line (example: train on a track) • Reciprocating motion – linear motion that goes back and forth (example: pushing a slider-crank back and forth, such as the piston in an internal combustion engine) • Rotary motion – circular motion (example: the hands of a clock moving, or a wheel on an axle) • Oscillating motion – circular or arc-motion back and forth