Here, input data for Axial Vibration Applications are described. Data supplier is indicated in the ‘SUPPLIER’ column.
Axial Vibration Calculation Input Data List
NAME | SUPPLIER |
Directly Coupled Diesel Engine | |
Engine type | Engine Manufacturer |
MCR, kW | |
Engine speed at MCR, rpm | |
MIP (or MEP efficiency coefficient), Мpа/bar | |
Cylinder number | |
Firing order | |
Cylinder diameter, mm | |
Stroke, mm | |
Conrod length or Crank/Conrod ratio | |
Diameter and length of the crankpin | |
Diameter and length of journal | |
The tensile strength of crankshaft material | |
The allowable bending stress of crankpin | |
Mass of the crank equivalent of radial inertia forces, kg | |
Radial harmonic coefficients and phases for normal operation | |
Mass-Elastic system characteristics (mass,kg; stiffness, kN/mm) | |
Absolute and Relative damping data, N s/mm | |
Misfiring Mode characteristics: allowable power and speed, MIP(MEP) |
|
Radial harmonic coefficients and phases for misfiring mode | |
The allowable axial offset of forward crankshaft end |
NAME | SUPPLIER |
Tilting-Pad Thrust bearing | |
Mass, kg | Engine Manufacturer, thrust bearing Manufacturer |
External stiffness (kN/mm) | |
Internal stiffness (kN/mm) | |
Oil film stiffness (kN/mm) | |
Oil film damping, N s/mm | |
Axial clearance, mm | |
Allowable axial force | |
Thrust shaft drawing | |
Damper | |
Mass, kg | Engine Manufacturer |
Stiffness, N/m | |
Damping data, N s/mm | |
Grounding stiffness, N/m |
NAME | SUPPLIER |
Propeller | |
Diameter | Propeller Manufacturer |
Number of blades | |
Pitch ( max, nominal) | |
Expanded area ratio | |
Mass of dry propeller, kg | |
Entrained water mass, kg (if there are customer’s value) | |
Damping, N s/mm (if there are customer’s value) | |
Thrust at MCR, kN | |
Thrust = function(rpm) | |
Excitation: 1-blade, 2-blade, 3-blade order (if there are customer’s value) | |
Gearbox | |
Output gear shaft drawing (with gear wheel) | Gearbox designer |
Shafting | |
Shafting drawings | Shaft designer |
Flexible coupling | |
Mass, kg | Flexible coupling manufacturer |
Stiffness, N/m | |
Damping data, N s/mm |