Automotive
 

Vibration Analysis

A product is exposed to various mechanical loads during its product life cycle. This may concern both transport and normal operation. To ensure that the product is able to withstand such loads, these are simulated in the test laboratory with vibration tests. Electro-dynamic shakers are implemented to excite vibrations in the component for vibration analysis and modal analysis. These shakers are also used for service life tests, where high frequencies must be applied.

We offer the following specific test procedures:

  • Vibration test (sinusoidal, noise)
  • Vibration test with temperature application (Shake&Bake)
  • Resonance analysis

Test modes:

Test modes are subdivided into:

  • Sinusoidal vibration = deterministic algorithmic vibrations
  • Random or noise excitation = stochastic vibrations
  • Shock excitation = single knocks or hits

The differences:

With sinusoidal signals, the energy for each frequency is generated individually and this is then temporally and sequentially applied over a frequency band. With noise signals, energy is generated for all frequencies simultaneously and transmitted.

This means that with sinusoidal signals, the resonances of a structure are excited only once, whereas with noise all resonances are continuously excited. This explains that with sinusoidal excitation the resonators (mass spring system) for a test object are also loaded to a greater degree with identical energy content (unnaturally).

Shock excitement refers to the excitation of a test object with knocks or hits. With this process, many frequencies are excited simultaneously with a single hit.

Test Manager SWR1200 special features and options

  • Sinus sweep: 1 Hz to 10 kHz, Linear sweep, log. sweep, manual and automatic
  • Noise: 0.1 Hz - 5 kHz, six selectable frequency ranges, 1024 lines
  • Resonance loading: Phase control, load sequences
  • Shock: Sinusoidal half-wave, trapezoid, saw tooth, user-defined
  • Remote monitoring: Software for observation PC
  • Sinus to noise: up to 8 sinusoidal vibrations are superimposed onto noise
  • Amplitude time sequence: Reproduction of acceleration time signals recorded in the field
  • External control via Active X software interface for controlling of vibration analysis via other programs

RMS SWR 3710
Test Manager SWR1200

Max. force
Shock15 KNas=1660m/s2
Sinus7,5 KNas=833m/s2
Noise

3,5 KNas=173m/s2
Max. mass 250 kg
Max. peak path 18 mm
Unloaded weight 10 kg

RMS SWR 6005
Test Manager SWR900

Max. force
Shock10 KNas=1000m/s2
Sinus11,7 KNas=1170m/s2
Noise

8,10 KNas=1170m/s2
Max. mass 250 kg
Max. peak path 18 mm
Unloaded weight 9 kg

S 50501
BAA 100-E

Max. force
Shock10 KNas=65 m/s2
Sinus11,7 KNas=513 m/s2
Noise

8,10 KNas=33 m/s2
Max. mass 25 kg
Max. peak path 25,4 mm
Unloaded weight 1,6 kg

Resonance measurement station

Frequency range25 kHz
Measurement precision +/- 10 Hz

Terms and conditions for the Environment Simulation Laboratory Herbrechtingen

Contact

Environment Simulation Laboratory
An der Bahnbrücke, 89542 Herbrechtingen