Experimental and Numerical Study of the Hydroelastic Response of a River-Sea-Going Container Ship

Abstract

The hydroelastic behaviour of a river-sea-going ship hull is analysed experimentally and numerically. A segmented ship model connected by a steel backbone is tested in regular waves, and its high-frequency vibrations such as springing and whipping responses are identified. The hydroelastic response of the ship is numerically calculated using a hydroelastic time domain method based on strip theory, which is extended to include an improved model of the slamming load. The slamming forces in the bow section are determined using the Modified Longvinovich Model (MLM) instead of the Von Karman model. The vertical motions and wave-induced loads are calculated and compared with the experimental results. The response amplitude operators of the vertical loads and the high-order harmonics are analysed under different speeds, showing good agreement with the experiments. The slamming loads on the bow section of a river-to-sea ship are predicted utilizing the MLM model and compared with the Arbitrary Lagrangian Eulerian algorithm by LS-DYNA and with the measured results.

Vibration Characteristic Research of 100 m New Polar Exploration Cruise Based on Finite Element Modeling

“…In the contribution analysis, the following formula is generally used to calculate the vibration contribution of the path corresponding to each load at the target point [5].…”

“…Pang et al [4] studied the vibration characteristics of cylindrical shells by a semianalytical method, solved the equations for the forced vibration characteristics of cylindrical shells, and analyzed the influence of boundary characteristics and structural parameters on the forced vibration of the cylindrical shells. Wang et al [5,6] explored the vibration features of both a broad flat vessel and a river-sea-going container ship under various stimuli through experimentation and numerical computations. Gong and Zhang et al [7] employed a local cabin finite element method (FEM) model and a single-cabin FEM model for a precise analysis of the grillage structure mode.…”

Experimental Study on the Effect of Extreme Waves on a LNG Carrier

“…Slamming occurrence on the chemical tanker advancing in extreme waves modelled with the nonlinear Schrödinger equation has been studied by Wang et al (2016). Wang et al (2020) has studied the hydroelastic response of a river-sea-going containership. Green water loading on the hatch covers of bulk carriers in extreme weather conditions has been estimated by Vassalos et al (2003) using empirical equations.…”