Laser Vibrometer

Student: Duncan Roxburgh

Supervisor: Professor Andrew Moore

Modal Hammer

Shaker

Accelerometer

• Compare modal excitation techniques

• Investigate traditional and optical vibration measurement methods

• Design virtual instrumentation to accept Modal Analysis

Vibration Response ImpactImpact

Frequency Response Function

Finite Element Model

Validate Finite Element Model with Experimental

Data

Each peak can be described by a ‘SDOF’model which allows the ‘Modal properties’ of the structure to be obtained.

• Natural Frequency

• Stiffness

• Damping

• Modal constant

Experimental model Vs. FE Model

MEngMEng 44thth Year ProjectsYear Projects (07(07--08)08)Dept. of Mechanical Engineering, HDept. of Mechanical Engineering, H--W UniversityW University