Section 2 Documentation required for design review
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Naval Ships, January 2023 - Volume 2 Machinery and Engineering Systems - Part 4 Propulsion Devices - Chapter 3 Thrusters - Section 2 Documentation required for design review

Section 2 Documentation required for design review

Parent topic: Chapter 3 Thrusters

2.1 Submission of information

2.1.1 The following plans and information as detailed in Vol 2, Pt 4, Ch 3, 2.2 Plans and Vol 2, Pt 4, Ch 3, 2.3 Calculations and specifications are to be submitted.

2.2 Plans

2.2.1  Fixed/Azimuth propulsion thrusters

  1. A general arrangement sectional assembly plan showing all the connections of the torque transmitting components from the prime mover to the propeller, together with the azimuthing mechanism and, if a nozzle is provided, the nozzle ring structure and nozzle support struts.

  2. Detailed and dimensional plans of the individual torque transmitting components.

  3. Schematic plans of lubricating and hydraulic systems, together with pipe material, relief valves and working pressures.

2.2.2  Tunnel thrusters

Structural assembly plan including connections to tunnel.

2.3 Calculations and specifications

2.3.1  Fixed/Azimuth propulsion thrusters A System Design Description (see Vol 2, Pt 1, Ch 3, 3.5 System design description) containing the following:

  1. Thruster prime mover type and operational power/speed envelope.

  2. Rating and type of motor for the azimuthing mechanism (e.g. type – hydraulic or electric).

  3. Gearing calculations for the azimuthing mechanism which is to be designed to a recognised National Standard.

  4. Bearing specifications.

  5. Details of control engineering aspects in accordance with Vol 2, Pt 9, Ch 1 General Requirements for the Design and Construction of Electrotechnical Systems & Vol 2, Pt 9, Ch 7 Control, Alerts and Safety Systems.

  6. Calculations indicating suitability of components for short-term high power operation, where applicable. See Vol 2, Pt 1, Ch 3 Requirements for Design, Construction, Installation and Sea Trials of Engineering Systems

  7. Where carried out in accordance with Vol 2, Pt 1, Ch 3 Requirements for Design, Construction, Installation and Sea Trials of Engineering Systems, a fatigue strength analysis of components indicating a factor of safety of 1,5 at the design loads, based on a suitable fatigue failure criteria.

  8. The declared steering angle limits are to be stated by manufacturer for each azimuth thruster.

2.3.2  Tunnel thrusters

A System Design Description (see Vol 2, Pt 1, Ch 3, 3.5 System design description) detailing the gears, shafts, couplings and propeller, stock and struts, the thruster prime mover type and the operational power/speed envelope.

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