Course code MašZ4006

Credit points 1.50

# Dynamics of Machines II

Total Hours in Course60

Number of hours for lectures16

Number of hours for laboratory classes8

Independent study hours36

Date of course confirmation19.10.2011

Responsible UnitInstitute of Mechanics

### Course developers

Mehānikas institūts

Dr. sc. ing.

lect.

## Mārtiņš Dauvarts

Bc. sc. ing.

### Prior knowledge

Fizi2021, Physics I

LauZ4190, Theoretical Mechanics II

Mate1029, Mathematics I

Mate1030, Mathematics II

Meha4008, Theoretical Mechanics I

### 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. Students learn the mechanism and machine dynamics that 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. Graphical and analytical methods for analysis and design of machines and machines - Laboratory works.
Skills - can solve problems of machine and mechanism structure, kinematic, dynamic parameter optimization and machine vibration protection - Laboratory works.

Competence - Ability to use the acquired professional knowledge and skills in practical work and studies in solving engineering problems - Laboratory works.

### Course Content(Calendar)

1. Dynamic model of the machine unit. Laboratory work: Experimental determination of moment of inertia. (Lecture 1h, laboratory work 2h, independent work 4h)
2. Reducing the force to the main member. (Lecture 1h)
3. Reducing the mass to the main member. Laboratory work: Reduced friction coefficient in bearings. (Lecture 1h, laboratory work 2h, independent work 4h)
4. Balancing the rotors balancing the mechanisms. Laboratory work: Friction in the pair of screws. (Lecture 1h, laboratory work 2h, independent work 4h)
5. Balancing the combustion engine. Laboratory work: Gear manufacturing. (Lecture 1h, laboratory work 2h, independent work 8h)
6. Mechanical oscillations. (Lecture 1h)
7. Vibration sources. Laboratory work: Rotor static balancing. (Lecture 1h, laboratory work 2h, independent work 8h)
8. Vehicle vibration insulation. Laboratory work: Dynamic balancing of the rotor. (Lecture 1h, laboratory work 2h, independent work 8h)
9. Vibration protection methods. (Lecture 1h)
10. Vibration of operator seats. (Lecture 1h)
11. Active Vibrator Insulators. (Lecture 1h)
12. Active Vibrator Insulators. (Lecture 1h)
13. Synthesis of cam mechanisms. (Lecture 1h)
14. Synthesis of cam mechanisms. (Lecture 1h)
15. Mechanical measurements. (Lecture 1h)

16. Modeling of machinery. (Lecture 1h)

### Requirements for awarding credit points

Examination. The student takes the exam according to the performed and defended laboratory works.

### Description of the organization and tasks of students’ independent work

Laboratory Work Data Processing.

### Criteria for Evaluating Learning Outcomes

In the assessment of the exam, the assessments of the defended laboratory works are cumulatively included.

1. Meriam J.L., Kraige L.G. Engineering Mechanics. Dynamics. New York: John Wiley & Sons, 2003. 744 p
2. Gary L. Gray, Francesco Costanzo, Michael E. Plesha. Engineering mechanics. Dynamics. New York : McGraw-Hill. 2013. 832 p

3. Ozols O. Mehānismu un mašīnu teorija. Rīga: Zvaigzne, 1974. 418 Ipp.

1. Eckhardt H.D. Kinematic design of machines and mechanism. 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.

3. Rudņevs J., Ziņģis K. Mehānismu un mašīnu teorija. Rīga: Zvaigzne, 1986. 285 Ipp.

### Periodicals and other sources

1. Theory of Mechanisms and Machines. A Scientific Electronic Journal. Pieejams: http://tmm.spbstu.ru/english.html ISSN 2079-021X.

2. Machine design. Pieejams: http://www.machinedesign.com/

### Notes

The study course is included in the compulsory part of the Bachelor's study program in Agricultural Engineering at Faculty of Agricultural Engineering. 3rd study year 6th semester.