Course code: mt212

Course name: Marine Engineering B

This concerns a Course

ECTS credit points: 3

Faculty of Mechanical Engineering and Marine Technology

Section of Design of Marine Systems

Lecturer(s): Klein Woud, prof.ir. J.

Tel.:  015 - 27 81556 /      

Catalog data:

flexiblemounting of equipment, dynamics of shaft systems, torsional, axial and lateral vibrations (whirling), shaft alignment

Course year:

MSc 1^st year

Course language:

Dutch

In case of Dutch: Please contact the lecturer about an English alternative, whenever needed.

Semester:

1A

Hours per week:

2

Other hours:

Assessment:

Oral exam

Assessment period:

1A

(see academic calendar)

Prerequisites (course codes):

mt216

Follow up (course codes):

mt213

Detailed description of topics:

Flexible mounting, vibration and noise isolation:

1. Principles of flexible mounting

2. Systems with a single degree of freedom; 3 and 6 degrees of freedom

3. Design of flexible mounting systems

4. Balancing of piston engines, free forces and free moments

Torsional and axial vibrations:

1. Modeling, equations of motion

2. Natural frequencies and natural modes of vibration

3. Free and forced vibration, damped vibration

4. Diesel engines : modeling, excitation, inertia, crankshaft stiffness

5. Damping

6. Propellers

7. Elastic couplings, geared and branched systems

8. Torsional vibration dampers

9. Procedures for torsional vibration analysis ·

Lateral vibrations:

1. Modeling, equations of motion

2. Natural frequencies and natural modes of vibration with and without gyroscopic effects, bearing stiffness, shafts with non-circular symmetric cross section

3. Whirling vibrations in propeller shaft systems and diesel engines·          

Shaft alignment:

1. Problem definition, influencing factors

2. Desired alignment conditions

3. Alignment procedures

Course material:

• J.Klein Woud, "Marine Enguineering B", 2003.

References from literature:

• available in course material

Remarks assessment, entry requirements, etc.:

Learning goals:

The student must be able to:

1. describe and explain the reasons for flexible mounting of equipment on board of marine systems

2. calculate the natural frequencies and forced motions and to define the mass and stiffness matrices to this end

3. describe and explain elastic centre and stability of flexible mountings and the influence of seating stiffness on mounting systems

4. describe the main characteristics of rubber mounts and to calculate the stiffness for a simple rectangular geometry

5. define and calculate free forces and moments of piston type (crank / connecting rod) machinery, both for a single cylinder and for the complete machine and describe the influence of these free forces and moments on the design of a flexible mounting, including methods for balancing

6. describe the various types of vibration in drive (and shaft line) systems

7. calculate natural frequencies and forced damped motion for both torsional and axial vibrating systems and define the mass, stiffness and damping matrices to this end

8. describe and calculate (different types of excitation) forces and damping in torsional and axial vibrating systems such as: diesel engines, pumps, propellers, couplings

9. describe bending / whirling vibrations, including gyroscopic effect and bearing stiffness influence, describe forward and counter whirland and calculate whirling natural frequencies for simple cases

10. describe and explain design criteria for shafting systems with regard to vibrations

Computer use:

Laboratory project(s):

Design content:

shaft vibrations and alignment

Percentage of design:  50%