VIVIANI , Michele

Use of electronic control onboard to handle complex and powerful propulsion systems has constantly increased; this, in turn, may influence ship behaviour during manoeuvres. As it is well known during manoeuvre of a twin-propeller vessel, like turning circle or zig-zag manoeuvres, significant unbalances on the shaft lines, in terms of torque and...

Nato publication on ship manoeuvrability resulting from work in the NATO ST-NSM (Specialist Team Naval Ship Manoeuvrability)

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NATO publication on ship manoeuvrability resulting from work of NATO ST-NSM (Specialist Team Naval Ship Manoeuvrability)

Nato publication (Standardisation agreement) on ship manoeuvrability resulting from work of the NATO ST-SM (Specialist Team –Seaway Mobility)

Design and optimization of the propulsion system is a crucial task of the ship design. In fact the behaviour of the propulsion system is a key aspect of the global behaviour of a ship, mainly if the ship is a naval vessel. Simulation techniques can be very effective to predict the propulsion plant behaviour during normal working conditions as...

This work presents the main steps for the development of a multi-physic simulation platform, able to represent the dynamics of a twin screw ship in six degrees of freedom, taking into account the complete propulsion system including automation effects. The simulation platform has to be used in the preliminary design phase in order to study and...

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Conferenza Atena, Settembre 2007, Fiesso d'Artico

A comprehensive approach to modelling and simulation of high speed craft dynamics during turning circle and zig-zag manoeuvres is presented in this paper. The high performance requirements for propulsion systems and the increasing attention being paid to planing hull manoeuvring features suggest the need for a thorough investigation into ship...

A comprehensive approach to model and simulate high speed craft dynamics during turning circles and zig-zag manoeuvres is presented in this paper. The high performance requirements for propulsion systems and the increasing attention on manoeuvring features suggest the need for a thorough investigation about planing hull dynamics, already in the...

THE PRESENT WORK ADDRESSES THE ASYMMETRICAL FUNCTIONING OF RUDDER/PROPEL LER COMPLEX OF TWIN SCREW/TWIN RUDDERS SHIPS. A SERIES OF FREE RUNNING MODEL TEST RESULTS ARE ANALYSED, WITH THE AID OF SOME SIMPLIFIED NUMERICAL CALCULATIONS. THIS ANALYSIS ALLOWS TO SHOW THE ASYMMETRICAL PROPEL LER LOADING DURING MANOEUVRES AND THE CONSIDERABLY DI...

The propeller performances and in particular the non-stationary cavitating behavior and its side effects, i.e. pressure pulses and radiated noise, are strongly dependent on the ship wake field. Many different predictive methods are available, however in many cases predictions are still performed on the basis of semi-empirical approaches, whose...

In the present study SPH method was applied in order to study the peculiar flow around a 2D flat planing surface. Results were compared with analytical solutions and RANSE calculations. For the application of the method to this particular case an SPH code with an inlet and an outlet of particles was developed.

Although a more and more increasing industrial interest regarding the production of effective and safe propulsion systems for high performance craft has been shown in the last years, some important propulsive aspects, as the manoeuvrability of planing boats, are not yet widely covered in literature. In order to respond to the growing demand of...

In the present paper the current status of the development of the DINAV manoeuvrability and propulsion simulator for planing boats is described. This topic, despite not being widely covered in literature, has shown in past years an increasing industrial interest due the higher demand for high quality systems in the leisure boat market,...

In recent years an increasing interest towards innovative techniques to be applied in usual experimental facilities has grown. From cavitation tunnel point of view, attention has been given to measurement of dimensions of propeller cavitation bubbles. The need arises from the increase in ship performance and environmental/comfort requirements,...