VIBRATION ANALYSIS application examples
This page shows some application examples from the area of vibration measurement and vibration testing.
Contactless measurement of the resonance curve of a spring
With the combination of StrobeCAM and LIMtrack, the resonance curve is measured during a frequency sweep. In this example, a spring on an electrodynamic shaker is excited at 20-200Hz. The spring is provided with paper markers for movement measurement using LIMtrack.
This application example in the field of vibration analysis demonstrates the non-contact vibration analysis and the measurement of the resonance curve of a delicate component (thin spring steel) with a LIMESS camera system.
Vibration measurement of electronic components on a PCB Board by using a high resolution camera
Vibration testing of a PCB board on an electrodynamic shaker. The visualisation with the StrobeCAM shows the motion of the electronic components and discovers meachanical problems, that can lead to a fatigue failure.
This application example shows the video generated with a StrobeCAM for documenting unwanted component vibrations.
Slow motion visualisation of the deformation of a connection plate under vibration load
Vibration testing of a connector panel on a electrodynamic shaker. The visualisation with the StrobeCAM shows in slow motion the deformation of the panel at a resonance frequency.
This application example shows the visualization of a component vibration with an LIMESS camera and without a strobe lamp.
Slow motion visualisation of a spring at it's Resonance frequency
Vibration testing of a spring on a electrodynamic shaker. The visualisation with the StrobeCAM shows in slow motion the spring deformation at it's resonance frequency.
This application example of vibration analysis shows the visualization of a component vibration with a precisely synchronizable camera and without a strobe light.
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.
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.
Non-contact measurement of natural frequency and vibration damping
The free vibration of an aluminium plate that is clamped at one side is measured with the fast RTSS system. The plate is accelerated by an impulse at the free end. The fast RTSS system achieves a measurement rate of 1500Hz and can therefore resolve motion frequencies up to 500Hz.
This application example in the field of vibration analysis shows that when using a camera to measure vibrations, the natural frequency and damping properties of the component are not influenced.
Measurement of the Eigen frequency of a tuning fork
The vibration of a tuning fork is measured with the fast RTSS system. The tuning fork is marked with a line sticker to improve the RTSS measurement accuracy. The fast RTSS system achieves a measurement rate of 1500Hz and can therefore resolve motion frequencies of up to 500Hz.
This application example in the fielld of vibration analysis shows the camera-based measurement of the natural frequency. In contrast to an acceleration sensor, the surface marking is almost massless and therefore does not change the egen frequency.
Full field 3D Vibration measurement in the wind tunnel
The vibration of a car door in the wind tunnel is measured with the Q400 Highspeed DIC System. The modal shape is calculated from the spatially resolved 3D displacement. The color overlay shows the modal shape of the vibration. The measurement resolution is a few µm (micrometers).
This application example in the field of vibration analysis shows that a DIC system with two cameras with can be used for 3D vibration measurement. Compared to a laser interferometer, the dynamic and static deformation components can be separated.