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VIBRATION ANALYSIS application example

Non-contact measurement of the modal shape of a wing using DIC

The modal shape of a wing (aircraft model) is measured using the high-resolution Q400 DIC system. The aircraft model is excited at its natural frequency using an electrodynamic shaker. The Q400 system measures the areal 3D deformation with high accuracy and spatial resolution, from which the natural frequencies and modal shapes can be automatically calculated.
The video shows the wing displacement as an 100x upscaled grid overlay and the measurement displacement of the wing tip versus time.

This application example in the field of vibration analysis shows that with precise phase-synchronous triggering of a slower camera, the 3D modal shape analysis at a natural frequency is possible even without a high-speed camera.

Why is modal form analysis carried out?

Modal form analysis is performed to determine the natural frequencies, natural modes and damping behavior of a mechanical system. This analysis provides important information about the dynamic properties of the system and is used in various applications:

Structural dynamics

In structural dynamics, modal shape analyzes are carried out to characterize the vibration behavior of structures. This is particularly important for structures, bridges, buildings, vehicles and other structures to ensure they meet stability, strength and reliability requirements.

Vehicle technology

In automotive engineering, modal shape analyzes are carried out to understand and optimize the vibration behavior of vehicles such as cars, trains, airplanes and ships. This helps improve driving comfort, safety and performance.


In aerospace engineering, modal form analysis is used to characterize the dynamic behavior of aircraft, rockets, satellites, and other aircraft and spacecraft. This helps in structural optimization and reducing vibrations during operation.

Mechanical engineering

In mechanical engineering, modal shape analyzes are carried out to examine the vibration behavior of machines and systems. This is important to avoid vibration problems that can lead to premature wear, malfunction or safety risks.

Product development

In product development, modal shape analysis is used to evaluate the dynamic behavior of products such as electronic devices, household appliances, machine tools and other products. This helps optimize design and improve product performance and reliability.

Overall, modal shape analysis enables a detailed characterization of the dynamic properties of mechanical systems, which is used in various industries to improve products, structures and systems.

Limess q400 modeshape 86hz 1