Laboratory equipment

On this page you will find information about the equipment of the Laboratory for Machine Dynamics.

Among other things, state-of-the-art measurement technology and various devices for the excitation of vibrations are available.

Vibration measurement system PSV-500

Car door on table, vibration measuring system

Non-contact, full-surface measurement of vibration shapes.

In contrast to glued-on acceleration sensors, the scanning vibrometer takes precise measurements regardless of the geometry, surface or dynamics of the component. This is made possible by the laser-supported scanning of the component.

To identify the vibration behavior of a component, the system offers the option of visually displaying the vibration shapes that occur.

Experimental modal analysis with M+P Analyzer

With the M+P Analyzer, vibration signals are precisely recorded and evaluated in the time and frequency domain. FFT analyses and transfer functions can be used to reliably determine natural frequencies, mode shapes, resonances and damping properties.

Three differently sized modal hammers are available for experimental modal analysis. This means that both the smallest electronic components and large structures - including buildings - can be examined using measurement technology.

Shaker

Various electromechanical shakers are used in the Laboratory for Machine Dynamics to excite vibrations over a wide frequency band and high accelerations. The laboratory is equipped with the following hardware and software

Tira S 54216-130

Nominal force (sine/noise/shock): 1600N / 1000N / 2000N
Frequency range: 2 Hz - 4 kHz
Maximum acceleration (sine/noise/shock): 60g / 40g / 80g

Tira S 52120

Nominal force (sine/noise): 200/100 N
Frequency range: 2Hz - 7 kHz
Maximum acceleration (sine/noise): 100/50 g

LDS V455

Maximum force: 498N
Frequency range: 5 Hz - 7.5 kHz
Maximum acceleration: 117g

Tribometer Anton Paar TRB³

Universal tribometer for determining friction and wear of various materials.

Measuring methods: rotary (pin-on-disc) / linear oscillating / rotary oscillating
Long-term measurements
dry and lubricated friction measurements
Determination of wear
Friction on sealing materials
Determination of the service life of coatings

Sliding bushing test bench

Tribological tests are carried out on a specially developed test rig that is specially adapted to the geometry of sliding sleeves. The test system is based on the C2 method in accordance with DIN ISO 7148-2. The sliding sleeves are mounted in a pendulum device and are supported on one side by a motor-driven shaft. The load is applied via defined test weights (0.5 kg / 1.0 kg / 2.0 kg), which are transferred to the test specimens via the pendulum mechanism. Friction is measured without contact by a laser sensor that measures the horizontal deflection of the pendulum arm. The friction coefficient is calculated on the basis of this measurement.

Automated modal hammer NV-Tech SAM

In addition to the shakers, a modal hammer is also used to stimulate vibration. To support the user, the impact movement is carried out using a controllable stepper motor in order to be able to make repeatable and precise impacts.

Simulation with FEM software tools

Crash simulation before after — Crash simulation (Bachelor thesis Dirk Waddenberg)

The Laboratory for Machine Dynamics uses the Abaqus and Comsol software packages to carry out simulations with finite element models (FEM).
These programs are used to virtually reproduce and simulate test setups. Simulation models can be validated by comparing them with experimental data so that predictions about component behavior can be made in further virtual tests.
Furthermore, FEM software is helpful for making statements about the properties of the component in the early phase of a development project without having to produce a costly prototype.

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