Ship structure collision experiments and simplified numerical calculation method
[Objectives]Although the fluid-structure interaction calculation method can better simulate the ship collision process,it requires a longer calculation time.To address this problem,a simplified numerical calculation method is proposed.[Methods]The local cabin section of a ship is taken as the object to carry out water collision experiments under various operating conditions.Force sensors and non-contact measure-ment based on high-speed photography technology are used to obtain the collision force and motion time his-tory data of the ship.The collision contact force and acceleration response data are then analyzed,and arbit-rary Lagrange-Euler(ALE)coupled fluid-solid numerical computational analysis is carried out on the experi-mental process.The effect of the water on the impacting ship in the collision process is then simplified to the equivalent mass,and the effect on the impacted ship is simplified to the equivalent resistance,which acts on the non-impacting side of the impacted ship in the form of surface force to hinder the movement of the im-pacted ship.Numerical calculations that do not involve the water-structure coupling process are then carried out on the basis of the simplified method.[Results]The results show that the errors between the peak colli-sion force and the experimental values for each condition obtained by the simplified calculation method are within 5%,and the calculation time required by this method is much smaller than that of the ALE fluid-structure interaction algorithm[Conclusions]The proposed simplified numerical calculation method can provide useful references for realizing the efficient calculation of ship structure collision response.
model testnumerical simulationcollision responsearbitrary Lagrange-Euler(ALE)fluid-structure interaction
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维普
