Source type: Impact hammer

Modelling parts: Pile, Water, Seabed, Hammer force

Description: SILENCE is a validated model that can be used for the generation of detailed noise prediction maps in offshore environments characterised by constant bathymetry and seabed compiled by (almost) horizontally stratified layers. The complete model comprises two modules; a near-source module and a far-from-source module. The near-source module is adopted to capture the interaction between the pile, fluid, and soil and aims at modelling the sound generation and propagation in the vicinity of the monopile. The Green's tensor for an axisymmetric ring source in a horizontally stratified acousto-elastic half-space emitting both compressional and shear waves is derived using the normal modes and branch line integrations. The boundary integral equations are then formulated based on the reciprocity theorem, which forms the mathematical basis of the far-from-source module for the propagation of the wavefield at large radial distances. The description of the flow diagram for SILENCE is shown below.

Examples: SILENCE can be run from a MATLAB GUI for the selected input files. As a result of SILENCE, acoustic pressure field which is generated by a pile sound source can be calculated. Some of the results which are obtained by SILENCE software are shown in the following figures.

Software request form:  Please fill in the request form online to request this software package and our research team will contact you.

Feedback/suggestions: If you have any questions, feedback, or suggestion, please contact us with the feedback form or following e-mails.

Apostolos Tsouvalas, e:mail: A.Tsouvalas@tudelft.nl