Gas-liquid-solid multi-field coupling stability and nonlinear dynamic response of GPLR-SFGP plates

• Published in: Ocean engineering 2024-03, Vol.295, p.116715, Article 116715
• Main Authors: Wang, Zongcheng, Yao, Guo, Yu, Yongheng
• Format: Article
• Language: English
• Subjects: Local immersion; Nonlinear vibration; Sandwich functionally graded porous plate; Stability analysis
• ISSN: 0029-8018; 1873-5258
• DOI: 10.1016/j.oceaneng.2024.116715

This paper investigates the stability and nonlinear dynamics of a multi-field coupling system comprising gas, liquid, and a functionally graded porous plate reinforced with graphene platelets (GPLR-SFGP) in the local immersion state. The multi-field coupling nonlinear dynamic system model of the GPLR-SFGP plate, considering the ideal fluid hypothesis and nonlinear plate theory, is established. The state-space approach is utilized to analyze the natural frequencies of the partially submerged plate with respect to the porosity and GPL weight percentage. The plate's critical divergence plane is also graphed, and an evaluation is conducted regarding how these parameters affect the stability of the system. For the nonlinear dynamic analysis, the amplitude-frequency resonance curve of the system is provided. The impacts of the immersion depth, the fluid velocity and design parameters on the nonlinear response of the system are explored. Derived from theoretical and numerical analysis, an optimal design principle for the GPLR-SFGP plate in a gas-liquid-solid coupling environment is proposed. •Considered the particular circumstance of the plate in the local immersion state.•Established the nonlinear dynamic model of the graphene reinforced plates with various pore types.•The instability curves and surfaces of the system are drawn in the local immersion state.•The amplitude-frequency resonance response curve of the system is drawn.