Course code MašZ4005

Credit points 1.50

Dynamics of Machines I

Total Hours in Course60

Number of hours for lectures16

Number of hours for seminars and practical classes8

Independent study hours36

Date of course confirmation07.02.2017

Responsible UnitInstitute of Mechanics

Course developer

author lect.

Mārtiņš Dauvarts

Bc. sc. ing.

Course abstract

The aim of the course is to develop an understanding of mechanisms, machines and their division, as well as of machinery assemblies and their formation. In the course students learn the structure analysis and classification of mechanisms as well as kinematic analysis. Kinetostatic methods and understanding of mechanisms and machines dynamics serve as a basis for machine calculations. Transmission mechanism kinematics and their synthesis are the basis for machine design. Understanding the problem of vibration insulation is important for successful machine operation.

Learning outcomes and their assessment

Knowledge: - is familiar with the laws and operation of machinery and mechanisms. Knows the theoretical foundations of the actual motion detection and provision of machine units. Knowledge of graphical and analytical methods of analysis and design of mechanisms and machines - 1st homework.
Skills: - is able to solve problems of machine and mechanism structure, kinematic, dynamic parameter optimization and machine vibration protection - 2nd home work.
Competence: Ability to use the acquired professional knowledge and skills in practical work and studies in engineering problems - practical work.

Course Content(Calendar)

1. Mechanism, machines and their division. Machine unit. Mechanization and Automation.
2. Components of the mechanism, moving joints. Kinematic pairs and chains. Structure diagram and links.
3. Repetitive links and universal structure formulas.
4. Mechanism of structures and groups of structures. Calculating speeds for diadu mechanisms.
5. Speed and acceleration plans.
6. Methods of analytical kinematics of flat mechanisms - practical work: Crank-slider mechanism kinematics.
7. Determination of Force in Mechanisms. Calculation of inertial forces. Kinetostatics. Zhukovsky lever.
8. Cardan shaft and cardan shaft kinematics.
9. Rotational transmission and planetary transmission kinematics.
10. Involute conversation. Gear transmission synthesis.
11. Gear manufacturing methods. Adjusted gears.
12. The kinematics of the beam mechanism.
13. Synthesis of the beam mechanism.
14. Friction in slides and hinges.
15. Friction in screws pairs. Friction in bearings.
16. Energy performance criteria for machinery.

Requirements for awarding credit points

Test.
The test is a joint assessment of completed and defended home work and practical work.

Description of the organization and tasks of students’ independent work

1st homework - Mechanism of speed and acceleration plans, its structure analysis - 18 h.
2nd homework - Combined Gear Transmission Calculation, Structure Analysis - 18 h.

Criteria for Evaluating Learning Outcomes

The student obtains a successful evaluation of home work and practical work if the calculation methods are acquired and can explain the calculations.

Compulsory reading

1. Rudņevs J. un Mazais J. Mehānismu analīze un sintēze. 1. studiju burtnīca. RTU: Ražošanas kvalitātes institūts, 2006. 65 lpp.
Pieejams http://omega.rtu.lv/rki/MMT-Gr1.pdf.

Further reading

1. Eckhardt, Homer D. Kinematic design of machines and mechanisms. New York:: McGraw-Hill, 1998. 612 p.
2. Wilson C.E, Sadler J.P. Kinematics and Dynamics of Machinery. New York: Harper Collins College Publishers, 1993. 797 p.

Periodicals and other sources

1. Theory of Mechanisms and Machines. A Scientific Electronic Journal.- http://tmm.spbstu.ru/english.html ISSN 2079-021X.
2. Machine design. - http://www.machinedesign.com/

Notes

The study course is included in the compulsory part of the professional bachelor study program "Machine design and production" of Faculty of Engineering.