## ME30033: Mechanical vibrations & noise

[Page last updated: 04 August 2021]

Owning Department/School: Department of Mechanical Engineering
Credits: 6 [equivalent to 12 CATS credits]
Notional Study Hours: 120
Level: Honours (FHEQ level 6)
Period:
Semester 1
Assessment Summary: EX 100%
Assessment Detail:
• Examination (EX 100%)
Supplementary Assessment:
ME30033 Re-Assessment Examination (where allowed by programme regulations)
Requisites:
Description: Aims:
To introduce quantitative aspects of noise control and to give an appreciation of some of the problems involved.
To acquaint the student with more advanced aspects of vibration.

Learning Outcomes:
After taking this unit the student should be able to:
* Calculate sound pressure level given relevant power and material data. Estimate the reduction in sound pressure level that could be achieved by the use of a barrier or enclosure.
* Apply harmonic balance, phase-plane and energy methods to non-linear systems.
* Solve Rayleigh's equation to obtain limit cycle solutions and also to solve Duffing's equation and explain jump phenomena.

Skills:
Problem solving; numeracy; working independently.

Content:
Behaviour of sound waves: the wave equation and Helmholtz equation, resonance, standing waves, addition of sounds.
Response of the ear. Noise exposure and codes of practice.
Noise isolation and absorption, barriers and enclosures.
Nonlinear vibrating systems and their analysis using harmonic balance, phase plane diagrams and energy methods.

Programme availability:

#### ME30033 is Compulsory on the following programmes:

Department of Mechanical Engineering
• UEME-AFB16 : BEng(Hons) Mechanical Engineering (Year 3)
• UEME-AKB16 : BEng(Hons) Mechanical Engineering with Year long work placement (Year 4)
• UEME-AFM16 : MEng(Hons) Mechanical Engineering (Year 3)
• UEME-AKM16 : MEng(Hons) Mechanical Engineering with Year long work placement (Year 4)

#### ME30033 is Optional on the following programmes:

Department of Electronic & Electrical Engineering
• UEXX-AFB02 : BEng(Hons) Integrated Mechanical and Electrical Engineering (Year 3)
• UEXX-AKB02 : BEng(Hons) Integrated Mechanical and Electrical Engineering with Year long work placement (Year 4)
• UEXX-AFM02 : MEng(Hons) Integrated Mechanical and Electrical Engineering (Year 3)
• UEXX-AKM02 : MEng(Hons) Integrated Mechanical and Electrical Engineering with Year long work placement (Year 4)
Department of Mechanical Engineering
• UEME-AFM04 : MEng(Hons) Aerospace Engineering (Year 4)
• UEME-AKM04 : MEng(Hons) Aerospace Engineering with Year long work placement (Year 5)
• UEME-AFM47 : MEng(Hons) Mechanical with Automotive Engineering (Year 4)
• UEME-AKM47 : MEng(Hons) Mechanical with Automotive Engineering with Year long work placement (Year 5)

 Notes: This unit catalogue is applicable for the 2021/22 academic year only. Students continuing their studies into 2022/23 and beyond should not assume that this unit will be available in future years in the format displayed here for 2021/22. Programmes and units are subject to change in accordance with normal University procedures. Availability of units will be subject to constraints such as staff availability, minimum and maximum group sizes, and timetabling factors as well as a student's ability to meet any pre-requisite rules. Find out more about these and other important University terms and conditions here.