Dynamic stability research on stiffened plate of ship structures under harmonic excitation

ABSTRACT

With the increasing development of high-speed, large-scale and light-weight ships, the demand for high-tensile steel in ship structures is continuously rising. This has promoted a decrease in plate thickness, which in turn contributes to the critical issue of structural stability. As ships navigate in waves, they are exposed to dynamic loads, making it crucial to investigate the dynamic stability behaviour of ship structures. In this research, the dynamic stability of plates was investigated theoretically, and the influences of boundary conditions and damping were discussed. Then, a numerical simulation system using MITC4 shell elements was developed to investigate the dynamic stability of stiffened plates. An experiment was conducted to validate the accuracy of the simulation system. Finally, the influences of various factors on the dynamic stability of stiffened plates were discussed in detail. This research has significant meaning for the safety and reliability design of ship structures.

KEYWORDS:

• Dynamic stability
• stiffened plate
• harmonic excitation
• influence parameter

Acknowledgements

This work was supported by the project ‘Research and application of green and smart river-sea-going ship technologies’.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

Some or all data, models or code that support the findings of this study are available from the corresponding author upon request.

Additional information

Funding

This work was supported by Key Research and Development Plan of Hubei Province, China (Research and Application of Green and Smart River-Sea-going Ship Technologies, No.20211g0104).