Frans Hendrik Lafeber

senior project manager

Defence

Powering & Signatures

Introduction

Frans Hendrik is Teamleader of the Ships Data Science & Process Optimisation team. He is also involved in (research) projects dealing with cavitation, propeller-induced pressure fluctuations and underwater radiated noise.

Expertise areas

Publications

Paper

A procedure for estimating mitigation effect of air injection on ship underwater radiated noise

25 aug. 2024

Increasing evidence exists that underwater radiated noise from ships has a negative impact on marine ecosystems. This has led to initiatives aimed ...

Paper

Ship URN mitigation by air injection: model-scale experiments and application to full-scale measurement data

17 mrt. 2024

It is recognised that continuous underwater radiated noise (URN) from shipping needs to be mitigated in order to minimise impact on marine animals. ...

Paper

Scale Model Measurements of Ship Machinery Noise Mitigation by Air Injection

24 okt. 2023

Underwater radiated noise (URN) from shipping is a main contributor to the rising noise levels in the oceans. There is growing evidence that this ...

Paper

Prediction of underwater radiated noise from propeller cavitation during concept design

17 okt. 2022

There is growing concern about the impact of underwater radiated noise (URN) on marine life. One of the main sources of URN of ships is propeller ...

Paper

The SOUNDS project: towards effective mitigation of underwater noise from shipping in Europe

20 jun. 2022

Continuous underwater noise from shipping has been identified as one of the main contributors to ambient noise levels in the oceans. Notwithstanding ...

Paper

Predicting cavitating propeller noise in off-design conditions using scale-resolving CFD simulations

15 jun. 2022

There is increasing awareness about the harmful impact of underwater radiated noise of shipping on the marine environment, with propeller cavitation ...

Paper

Progress in the prediction and mitigation of propeller cavitation noise and vibrations

16 nov. 2020

Comfort on board passenger vessels and pleasure craft is a primary design consideration. Furthermore, underwater radiated noise from vessels is ...

Paper

Noise measurements of a cavitating propeller in different facilities - Results of the round robin test programme

1 okt. 2020

Mitigation of shipping noise is a topical issue in marine engineering because of the dramatic increase in the levels of anthropogenic underwater ...

Paper

Calibration of flush-mounted hydrophones using various signal types

9 okt. 2019

Measurements of cavitation-induced underwater radiated noise (URN) are carried out on a regular basis in MARIN’s Depressurised Wave Basin ...

Paper

Noise measurements of a cavitating propeller in different facilities - Results of the round-robin test programme

9 okt. 2019

Mitigation of shipping noise is a topical issue in marine engineering because of the dramatic increase in the levels of anthropogenic underwater ...

Paper

Round Robin test on the underwater radiated noise of a cavitating ship propeller in open water

11 okt. 2017

Due to concerns about its effect on marine life, shipping noise is receiving increasing attention within the maritime industry. The primary noise ...

Paper

Validation of underwater radiated noise predictions for a merchant vessel using full-scale measurements

27 aug. 2017

Underwater radiated noise (URN) was previously primarily of interest in connection with the signature of naval vessels. Recently it has become ...

Magazine

Capturing the invisible

17 aug. 2017

Reading time 6 minutes

High-speed video allows us to capture processes which occur too fast to be visible to the naked eye. This technology is especially valuable for the ...

Magazine

Supporting silent ships - measuring underwater radiated noise from cavitating ship propellers

17 aug. 2017

Reading time 6 minutes

Have you ever had problems talking to someone in a noisy environment such as a busy restaurant? The same happens to marine animals, which use sound ...

Paper

Validation of computational and experimental prediction methods

4 sep. 2016

Validation of computational and experimental prediction methods for the underwater radiated noise of a small research vesselModel tests and ...

Magazine

Accurate predictions for noise levels of cavitating propellers now possible

19 aug. 2016

Reading time 6 minutes

As underwater radiated noise levels in the oceans increases, MARIN has investigated just how much cavitating propellers are to blame.

Paper

Acoustic Reverberation Measurements in the Depressurized Wave Basin

1 okt. 2015

One method to determine the underwater radiated noise (URN) of the cavitating propeller of a ship is to perform model tests in a cavitation test ...

Paper

Determining Statistical Properties of Quasi-steady Measured Signals

1 okt. 2015

Quasi-steady measurement methods are becoming more commonplace in MARIN's model test basins for testing the open water performance of propellers, ...

Paper

Computational and Experimental Prediction of Propeller Cavitation Noise

21 mei 2015

Computational and experimental methods for the prediction of underwater-radiated noise due to propeller cavitation as in use at MARIN are discussed ...

Paper

Berth Scour Protection for Modern Vessels

5 jun. 2014

The increase in vessel size and vessel types along with new propulsion systems has created an increase in the scour action to berth beds. ...

Paper

Systematic Propeller Optimization Using an Unsteady Boundary-Element Method

25 okt. 2013

A propeller parameterization method and itsapplication to optimize a propeller geometry in an effectivewake field is presented. The parameterization ...

Paper

Underwater Radiated Noise Measurements for a Cruise Ferry

25 okt. 2013

Inboard noise and underwater radiated noise are becoming more and more important factors during the design of ships. Model tests are often used to ...

Paper

A quasi-steady method for efficiently conducting open water model tests

17 sep. 2013

Open water tests of propellers, pod units and thruster units are usually performed in a steady manner where the forward velocity and propeller ...

Paper

Underwater radiated noise measurements with a silent towing carriage in the depressurized wave basin

1 sep. 2013

Because of the increasing interest in underwater radiated noise levels of ships, noise mitigation measures have been applied to the new secondary ...

Magazine

Silence is golden... especially underwater

20 apr. 2012

Reading time 3 minutes