Investigation of planar translational and rotational stationary non-Gaussian random vibration test

Multi-shaker random vibration control with coordinate transformation technique is an advanced mechanical environment test method that translational and rotational vibrations of structure can be controlled simultaneously. This work presents theoretical and experimental investigations of multi-shaker planar translational and rotational non-Gaussian random vibration tests. First, the coordinate transformation technique is used to obtain the translational and rotational vibration responses of the test structure. Then the control procedure is formulated theoretically with matrix presentation in which a new nonlinear transformation method for generating non-Gaussian random signals is proposed. The correlation between translational and rotational vibrations is explored briefly from the perspective of common square control and transformation control. The influence of elastic characteristics of the test structure on the response spectral densities is investigated and a level definition method for translational and rotational vibrations is proposed. Finally, a planar translational and rotational non-Gaussian random vibration test is carried out to verify the validity of the proposed methods.

Automated summary

This study presents theoretical and experimental investigations on multi-shaker planar translational and rotational non-Gaussian random vibration tests. A coordinate transformation technique is used to obtain the vibration responses of the test structure, and a new nonlinear transformation method for generating non-Gaussian random signals is proposed. The influence of elastic characteristics of the test structure on the response spectral densities is investigated and a level definition method for translational and rotational vibrations is proposed. The validity of the proposed methods is verified through a non-Gaussian random vibration test.