Sound and Vibration Theory

Academic year

2025Year

Term

First Semester

Course title

Sound and Vibration Theory

Class type

Lecture

Course title (ENG)

Sound and Vibration Theory

Class code・Class name・Teaching forms

Z1500002 Sound and Vibration Theory

Instructor

YAMAMOTO Takashi

Credits

2.0Credits

Day and Time

Mon.5Period

Campus

Hachioji Remote

Location

Relationship between diploma policies and this course

A) A high degree of specialized expertise　100%
B) The skills to use science and technology　0%
C) The ability to conduct research independently, knowledge pertaining to society and occupations, and sense of ethics required of engineers and researchers　0%
D) Creative skills in specific areas of specialization　0%

Goals and objectives

Industrial structures such as automotive, railways and home appliances are forced to vibrate in operation by external forces generated from combustion engines and electric motors. Low vibration and sound pressure level must be secured in the design process to improve quality of structures. In this class,basic and advanced theory and modeling for mechanical vibrations and sound pressure generated from the structural vibrations are lectured.

Prerequisites

Review of applied mechanics is required

Method Using AL・ICT

Discussion Debate／Presentation

Class schedule

1. Overview and fundamentals of mechanical vibrations
2. Free vibrations and eigen frequency of 1 dof structure
3. Forced vibrations of 1 dof structure with no damping
4. Forced vibrations of 1 dof structure with damping
5. Free and forced vibrations of 2 dofs structure
6. Eigen values and eigen modes of 2 dofs structure
7. Dynamic damper
8. Vibration of plate
9. Fundamentals of acoustics
10. Sound propagation in free field
11. Resonance and its mode in close cavity
12. Sound propagation in small space
13. Sound transmission
14. Sound absorption
15. Review

Evaluation

Pass over 60 points for several reports and exercises.

Feedback for students

Feedback for report and presentation.

Textbooks

Not specified.

Reference materials

Not specified.

Office hours and How to contact teachers for questions

Any time by KU-LMS.

Message for students

Noise and vibration performances are extremely important to secure quality of mechanical products. Although mathematical equations seem to be complicated, equations of motions, which you have studied in high school, are the origin of all governinf equations. It would be a point to imagine vibration and sound pressure distributions

Course by professor with work experience

Applicable

Work experience and relevance to the course content if applicable

自動車業界において研究・先行開発のの経験がある教員が、車体の振動・騒音に関する実務経験を活かし、振動工学および音響工学について講義する。

Teaching profession course

Mechanical Engineering Program

Syllabus data