Hydroelastic responses of floating composite plates under moving loads using a hybrid moving element-boundary element method

Abstract

Responses of floating plates with the impact of moving excitations have been previously studied by several scholars. Generally, such structures were often assumed to be isotropic. Nonetheless, the directional-dependent bending stiffness should be considered for designing practical floating structures, especially for very large floating structures. Accordingly, this article aims to analyze hydroelastic responses of floating composite plates subjected to moving loads for the first time. For this, a novel numerical approach as a combination of boundary element method and moving element method which is named the BEM–MEM is proposed. In the this approach, governing equations of motion, moving element, and fluid matrices are formulated in a relative coordinate system traveling with moving loads. Consequently, the suggested paradigm can effectively eliminate difficulties in addressing the bound of computational domain and tracking the location of contact points which often encounter in the traditional finite element method owing to utilizing a fixed coordinate system. Several numerical examples are exhibited to demonstrate the performance and ability of the boundary element method-moving element method . Gained results are compared with those by the Fourier transform method and the asymptotic expression to verify the accuracy of the proposed methodology. The outcomes indicate that the speed of moving loads considerably affects the plate deflection. In addition, as the speed is larger than the minimum celerity of the free surface of hydroelastic system ( Cmin), the influence of anisotropy on the deflection becomes significant.

FEM-SPH Numerical Simulation of Impact Loading on Floating Laminates

“…The anisotropy of the composite material under dynamic loading is considered by [19] using a moving element method (MEM)-FEM hybrid model, which, on the other side, is not dealing with foreign object impact loading.…”

A Numerical Study on the Response of a Very Large Floating Airport to Airplane Movement

“…The horizontally two-dimensional linear response of a floating airport to the landing and takeoff of an airplane was investigated using the time-domain mode expansion method [27]. Moreover, a combination of a BEM and moving element method (MEM) was utilized to study the hydroelastic response of floating composite plates subjected to moving loads [28].…”

Moving Element Analysis of High-Speed Train-Slab Track System Considering Discrete Rail Pads

“…Since then, many researchers have applied this technique to study various moving load problems. [17][18][19][20][21][22][23][24][25][26][27][28] For example, Ang and Dai 17 employed the MEM to investigate the dynamic response of a high-speed rail system accounting for an abrupt change of the foundation stiffness. The railway beam was treated as a viscously damped Euler-Bernoulli beam resting on a Winkler foundation.…”