[Objectives] Several methods to model a VLFS with complicated connections are presented in the framework of the discrete-module-beam (DMB) hydroelasticity method, along with comparisons with existing methods.
[Methods] A brief introduction of the DMB method is given, followed by procedures in calculating the dynamic response of VLFS under regular waves. A structural stiffness matrix is defined to model connections in VLFS. Amendments are made to achieve new hydroelastic equations amongst all lumped masses by adding revised structural stiffness matrix and excitation force matrix. Trends of the response of VLFS against different bending stiffness are explored and the corresponding reasons are presented.
[Results] It shows that all four approaches are capable of making precise predictions of the hydroelastic response of VLFS.
[Conclusions] This paper has extended the application of DMB method in predicting the dynamic response of non-continuous VLFS, such as multi-hinged VLFS and VLFS with fracture places.