Torsional vibration analysis general requirements.

1. TVA
General Requirements
Ra’uf Tailony
01/19/2018

2. Tools and software to purchase
• MATLAB software and license
• 3D CAD design software (Inventor, Catia, Solidworks, etc.)
Engineering
• The driveline design drawings or CAD
• The engine design drawing for Crankshaft and piston geometry
• The engine engineering specs (connecting rod length, number of cylinders, firing order,
etc.)
• The engagement sequence and type of the driveline with the engine (permanent,
tapered pins, gears contact…)
• The elastic properties of the driveline components and the engine (Stiffness, polar
inertia, mass inertia, center of gravity, shear modulus)
• Drivetrain materials category (pure metal, alloys, mix….)
• Machine operating speed range
• The method of speed and torque variation (smooth ramping, instantaneous change
through gear box, high speed disengagement,…)
• Vibration suppression hardware (cushions, rubber, springs, sway bars etc.)
Manufacturing
• Verifying the couplers alignment relative to the driveline
• tightening the assemblies’ bolts as rated
• verifying the flex plates degrees of freedom as rated
Outcomes
• Locating the system’s natural frequencies (report)
• Defining the machine’s critical speeds
• Locating the vibrational nodes along the driveline
• Graphical representation of structural failure modes