Random On Random Vibration testing

What is random on random vibration testing?

Random on Random vibration (RoR) testing runs a complex test configuration file that contains two different random signals: a random background signal and a narrowband signal. This hybrid mode method controls the simulation of complex vibration environments in the real world through a combination of broadband random signals and one or more superimposed random narrowband signals. Narrowband signals can be swept or fixed in frequency, covering a basic random energy distribution. Simultaneously execute random vibrations to simulate a service environment where two modes coexist.

In random vibration testing, the function of the basic random control curve is more complex, and all resonant frequencies of any given payload will be excited simultaneously; Therefore, it is highly suitable for fatigue testing and product identification. For example, the repeated stress on truck headlights is caused by the vehicle changing speed when driving on rough terrain.

Application

• Truck vibration test at varying speeds
• Test machines with reciprocating or rotating parts, such as propeller-driven aircraft
• Test tracked vehicles with two or more drivetrains to change speed and direction, such as bulldozers, tanks and excavators
• simulates vibrations characterized by a wideband random curve in which one or more random narrow-band signals are superimposed

Tanks or trucks, for example, change speed when traveling on rough roads. For example, the slope of the track will produce rhythmic random vibration peaks at a specific frequency, and the speed of the vehicle is related to this. Figure 1 shows the vibration test curve of a typical tracked vehicle in MIL-STD-810G.

Random Narrow-Band Signal

Up to 32 narrowband spectra can be defined, which are superimposed on the background random spectrum and can be scanned between different frequencies at a user programmable rate. This software supports setting independent scanning rates for each random “tone”.

Users can program amplitude, bandwidth, and frequency scanning parameters. Up to 200 individual frequency/amplitude breakpoints can be inputted to meet the requirements of almost any testing specification.

Whether your vibration testing needs are complex or simple, JOEO has the experience and expertise to meet your testing requirements. If you need more information about random on random vibration testing or other testing services, please feel free to contact JOEO, or you can call us on 13310826672. We look forward to helping and supporting you.