Why enroll

Participants join Experimental Modal Analysis programs to develop a strong practical understanding of structural dynamics and vibration behavior through hands-on testing and data interpretation. The course enables learners to accurately identify natural frequencies, mode shapes, and damping characteristics of real structures, which are essential for diagnosing vibration problems and improving dynamic performance.

By joining, participants gain exposure to industry-standard experimental techniques, including impact hammer testing, shaker excitation, sensor placement, and frequency response function (FRF) analysis. The program helps bridge the gap between theoretical vibration concepts and real-world applications, enhancing the ability to validate and update analytical and finite element models.

Additionally, participants benefit from learning how experimental modal analysis supports noise and vibration reduction, design optimization, and structural health assessment. These skills are highly valued in sectors such as automotive, aerospace, civil structures, and machinery design, making the course particularly beneficial for engineers, researchers, and postgraduate students seeking practical expertise in advanced vibration analysis.

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Course content

The course is readily available, allowing learners to start and complete it at their own pace.

Experimental modal analysis

30 Lectures

1577 min

Introduction video of Modal analysis course
Preview
4 min
Introduction
Preview
72 min
Lumped parameter models of Vibrating systems
55 min
SDOF Undamped system
68 min
SDOF system with Viscous damping
84 min
SDOF system with Structural damping
43 min
Modal analysis of MDOF Undamped system (Free vibration)
69 min
Modal analysis of MDOF Undamped system (Forced vibration)
77 min
Modal analysis of MDOF system with Structural damping
67 min
Modal analysis of MDOF system with Proportional Viscous damping
61 min
Modal analysis of MDOF system with Non-proportional Viscous damping
66 min
IRF and Transient resposne
67 min
FRF Characteristics of SDOF systems
52 min
FRF Characteristics of MDOF systems
64 min
Fourier series expansion
60 min
Fourier Transform
30 min
Discrete Fourier Series (DFS)
52 min
Discrete Fourier Transform (DFT), DTFT, FFT
49 min
Aliasing, Quantization
68 min
Windowing, Leakage, Window functions
68 min
Principle of Experimental Modal Analysis (EMA)
22 min
Excitation using an impact hammer
43 min
Response measurement, piezoelectric accelerometer
75 min
FRF estimation, H1 and H2, Coherence function
51 min
Test planning for FRF Measurement
59 min
FRF Measurement with an Impact hammer
27 min
Excitation using a Shaker
52 min
FRF estimation with random excitation
28 min
FRF measurement with random excitation
14 min
FRF measurement using Pseudo, Periodic and Burst random and sine chirp excitations
30 min

Course details

Experimental Modal Analysis (EMA) is a systematic and widely used vibration analysis technique employed to determine the dynamic characteristics of a physical structure through experimental testing. The primary objective of EMA is to identify a structure’s modal parameters—namely natural frequencies, mode shapes, and damping ratios—by measuring its response to controlled external excitation. These parameters are fundamental for understanding how a structure behaves under dynamic loading and for predicting its vibration and noise performance.

In experimental modal analysis, the test structure is excited using known input forces, typically applied through impact hammers, electrodynamic shakers, or hydraulic actuators. The resulting vibration response is measured at selected locations using sensors such as accelerometers, velocity transducers, or laser vibrometers. The input–output data are then processed using signal analysis techniques, including Fast Fourier Transform (FFT) and frequency response functions (FRFs), to extract the modal parameters of the system.

EMA is particularly valuable for validating analytical and numerical models, such as finite element models, by comparing experimentally obtained modal data with predicted results. It helps engineers identify discrepancies caused by modeling assumptions, boundary conditions, or material property variations. The technique is also extensively used in design optimization, structural modification, fault detection, and troubleshooting of vibration-related issues.

Applications of experimental modal analysis span a wide range of engineering fields, including mechanical, aerospace, civil, and automotive engineering. It is commonly applied to structures such as machine tools, automotive components, aircraft structures, bridges, and electronic assemblies. By providing accurate insight into real-world dynamic behavior, experimental modal analysis plays a critical role in improving structural reliability, performance, and durability under dynamic operating conditions.

source: NPTEL[youtube]

Course suitable for

Mechanics & Turbomachinery
Mechanical
Production

Key topics covered

introduction to experimental modal analysis
SDOF system with structural damping
modal analysis of MDOF system with proportional viscous damping
IRF and transient response
fourier transform
test planning for FRF measurement

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