Horizontal testing

Question

What are the mounting options and solutions for heavy objects side impact in the case if the tested object exceeds the value of the payload? What is the possible gain in the case of its use?

Answer

In the case of a vertical load test the tested objects mass is limited by the shaker structure, in particular, by trunnion used for moving element aligning. The more the load is, the lower shifts the moving part of the shaker – this causes knocking of the shaker under large displacements. Besides it causes change of shaker frequency characteristics – resonance frequency of the shaker decreases as the payload grows and it may affect the testing profile.

In the case of horizontal tests the tested object is levelled whether by slip table or by suspender. Slip table is normally ordered from a manufacturer. The suspender is developed by the user and needs some troubleshooting.

Slip tables maximum load is specified in the product certificate. However, it is better to confirm this information with manufacturer.

The suspender is to be developed and made by the user since it is not a commercial system.

Developement of a suspender is performed by the user – we can only provide you with several recommendations. In the course of suspender developement you can face resonance frequency of pendulum and bracings. Pendulum resonance frequency is calculated by the following formula: https://ru.wikipedia.org/wiki/Резонанс

Pendulum with 1 m length will have resonance frequency of 0,5 Hz. Pendulum length increase will lead to a change of resonance frequency.