Dynamic response analysis of light weight pyramidal sandwich plates subjected to water impact

• Autorzy: Hao Wang Hao , Fei Zhao , Jun Liu Jun , Yuan Tian Yuan
• Języki publikacji: EN

Abstrakty

EN

The fluid-solid interaction (FSI) dynamic responses for a Light Weight Pyramidal Sandwich Plate Structure (LWPSPS) under different water-entry velocities (1m/s-6m/s) are investigated numerically and theoretically. The characteristics of impact pressure and structure deformation are obtained by using LS-DYNA code based on the proposed 3D multi-physics (air-water-solid) FEM model. Numerical results show that the average water impact pressure of LWPSPS is much lower than that of the monolithic plate with same mass. Moreover, a phenomenon called “local air cushion” is observed for LWPSPS which does not exist for a monolithic plate. Theoretical hydroelasticity analysis demonstrates that the FSI effect of LWPSPS is weak when the ratio of water impact duration time to wet natural vibration period is greater than 4. In the study, an engineering estimation method to predict the maximum deformation of the LWPSPS is proposed, in which the total deformation is divided into two parts, i.e. local field deformation and global field deformation, and they are both computed using analytical model. Good agreement between the numerical results and ones obtained from the proposed engineering estimation method is achieved. Furthermore, the geometric variation sensitiveness analysis is also conducted.

Słowa kluczowe

EN

light weight pyramidal sandwich plate structures (LWPSPS); multi-physics numerical model; maximum deformation; quasi-static; local air cushion; Yuan-Sheng Cheng

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2012
• Tom: nr 4
• Strony: 31--43
• Opis fizyczny: Bibliogr. 39 poz., rys., tab.

Twórcy

autor

Hao Wang Hao

autor

Fei Zhao

autor

Jun Liu Jun

autor

Yuan Tian Yuan

• School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, P.R. China,

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