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

Article Engineering, Ocean

Fatigue life prediction of ship and offshore structures under wide-banded non-Gaussian random loadings Part II: extension to wide-banded non-Gaussian random processes

Hyeon-jin Kim et al.

Summary: This paper discusses the importance of accurate estimates of fatigue life of hot spots in ships and offshore structures in the design stage. A new approximation model for joint probability distribution of mean and amplitude of rainflow-counted cycles in wide-band Gaussian random processes is developed. The accuracy of the proposed model in fatigue damage assessment of offshore structures under non-Gaussian random loading is verified through numerical examples and compared to existing models.

APPLIED OCEAN RESEARCH (2021)

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Review Engineering, Aerospace

Stationary non-Gaussian random vibration control: A review

Ronghui Zheng et al.

Summary: This paper reviews various methods for controlling stationary non-Gaussian random vibration, discussing how to control time and frequency domain characteristics in non-Gaussian random vibration tests and generate a one frame stationary non-Gaussian random signal.

CHINESE JOURNAL OF AERONAUTICS (2021)

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Article Engineering, Mechanical

A simplified modelling and analysis of six degree of freedom random vibration test

Ronghui Zheng et al.

Summary: This paper discusses the modelling and analysis of six degree of freedom random vibration test using an advanced multi-input multi-output random vibration test system. A mechanical model of the system is established and the acceleration properties of the test article are analyzed. The influence of control point locations on the results is also examined.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2021)

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Article Engineering, Mechanical

Crest factor and kurtosis parameter under vibrational random loading

Adam Nieslony et al.

Summary: The study found that kurtosis and crest factor are more accurate indicators for describing the influence of load signal shape on material fatigue life.

INTERNATIONAL JOURNAL OF FATIGUE (2021)

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Article Engineering, Mechanical

Identification of real translational and rotational displacements of six-axial shakers with only six measured linear accelerations

Yvon Briend et al.

Summary: The REDEAT method proposed in this study can determine real six-axial shaker displacements by using measured linear accelerations, which is effective for validating the dynamic behavior model of on-board equipment. By solving a system of nonlinear time-differential equations through numerical integration with Newmark and Newton-Raphson schemes, and using data processing tools to evaluate the deviation between real and intended forced displacements, the method overcomes the classical divergence issue inherent to numerical integration.

MECHANICAL SYSTEMS AND SIGNAL PROCESSING (2021)

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Article Engineering, Mechanical