6 ECTS credits
160 h study time
Offer 1 with catalog number 1004489BNR for all students in the 2nd semester at a (B) Bachelor - advanced level.
This course discusses the kinematic and dynamic principles for a driveline of rotating machinery (motor-transmission-load). The course consist out of static/kinematic dimensioning as wel as the dynamic behavior of the rotating shaft with inclusions of its main components: bearings, gears, belts, couplings.
The study focusses on two main degrees of freedom : lateral (shaft on its bearings) and torsional (motor-load via coupling, belt or geaset). Additionally, the coupling between these two degrees of freedom is illustrated while discussion gears.
For the dynamic aspects the largest focus is set on stationarry conditions, however transient phenomena are briefly discussed as well.
Following specific parts are being discussed in detail:
- Lateral rotor dynamics: determination of the critical speed of shaft supported on its bearings. Several academic models to show the fundamentals of rotor dynamics are being constructed. Additionally, an extension is given to finite element modelling in the domain of applied industrial rotor dynamics.
- Static and dynamic aspects of bearings. The main focus is set on the impact of fluid-film bearings due to the specific influence on the rotor dynamics of these components. First the static load capacity of a fluid-film bearing is being modelled (theory of Sommerfeld). Secondly, the dynamic influence on the shaft (stiffness and damping) with inclusion on the stability problems is being discussed. Additionally, several aspects of rolling element bearings are being treated followed by mentioning of the main characteristics of air- and magnetic bearings.
- Balancing. This part discusses in detail the static and dynamic balancing of a rigid shaft with inclusion of the balanceclasses and industrial practise. Additionally the aspects of flexible balancing is being discussed.
- Transmission of power between motor and load. This part discusses the different torque-speed curves of motors and several loads, while focussing on the concept of working point when coupling both motor and load in a driveline.
- Torsional analysis of a drive-train. Several models with increasing degrees of freedom are created to calculate the crticial speeds and dynamic amplification of torsional excitation. Additionally, torsional aspects of a piston-rod system are being discussed in detail.
- Gears. Several possible gear configurations and some fundamental parameters for gears are overviewed. The kinematic conditions for proper gear contact and two methods to calculate the transmission ratio for a complex gear transmission unit are being discussed. Next , the working principle of planetary gears, with inclusion of a differential gear, is being treated. A short discussion of the dynamic influence of gears on the gearbox is being held. And finally, a gear model which couples the lateral and torsional degrees of freedom is shown.
- Belts. This part mainly focusses on the models for powertransmission capacity for flat as well as V-belts.
- Couplings. The first part deals with misalignment in a drive -train and the essential part of a coupling in this context. The static dimensioning of a coupling is being discussed (powertransmission). Next the dynamic influence of a coupling in a drivetrain is explained in detail: influence on critical speed location, addition of damping to the drivetrain, dynamic decoupling. Finally, an overview is given of different coupling types and a model is generated to calculate the friction in a clutching coupling (two plates).
The theory in the different chapters is being illustrated with several industrial case studies.
1. 'Kinematics and Dynamics of Machinery'; Part 1
2. 'Kinematics and Dynamics of Machinery' ; Part 2
These parts are published by University Press and are written in Dutch.
Additional (mandatory) text on rotordynamics and fluid-film bearings is written in english and available online.
Transparancies used during the course are available.
Complementary study material:
All advised readings are cited at the end of each module.
Most reference books are availablet.
-aims and objectives :
The purpose of this course is to illustrate the kinematic and dynamic phenomena in machines, in coupled rotating machinary
-exam requirements :
Good theoretical insight and knowledge and also capability to apply the theory on practical examples.
The final grade is composed based on the following categories:
Oral Exam determines 45% of the final mark.
Written Exam determines 35% of the final mark.
PRAC Practical Assignment determines 15% of the final mark.
PRAC Report determines 5% of the final mark.
Within the Oral Exam category, the following assignments need to be completed:
Within the Written Exam category, the following assignments need to be completed:
Within the PRAC Practical Assignment category, the following assignments need to be completed:
Within the PRAC Report category, the following assignments need to be completed:
Written exercise examination : 35%
Oral examination of the practical exercises and quotes of the laboratory reports (15%)
Oral examination : 45%
Report factory visits 5 %
If on one part a score <5/20 is obtained, then the proposed weights for each part can be adapted.
This offer is part of the following study plans:
Bachelor of Engineering: Mechanical and Electrotechnical Engineering (only offered in Dutch)
Bachelor of Engineering: verkort traject werktuigkunde-elektrotechniek na vooropleiding industriële wetenschappen (only offered in Dutch)
Bachelor of Engineering: verkort traject werktuigkunde-elektrotechniek na vooropleiding fysica (only offered in Dutch)
Master of Teaching in Science and Technology: ingenieurswetenschappen (120 ECTS, Etterbeek) (only offered in Dutch)
Preparatory Programme Master of Science in Electromechanical Engineering: Standaard traject (only offered in Dutch)