Evaluating criteria for DP vessels

• Autorzy: Herdzik J.
• Języki publikacji: EN

Abstrakty

EN

The paper presents the evaluating criteria for DP vessels. A few persons tried to give a simple tool for comparing the station keeping capability between different ships. It was started in the seventies when most vessels claiming to have a DP system would be carried away by the current only (the limit was 1.5 up to 2 knots). Mainly DNV and ABS, next IMO prepared the calculating methods for DP system evaluation during the design process to receive the DP class 1, 2 or 3. The regulations may help but it’s still only rough estimate. One of them is the most popular. It is the capability plot presenting at preliminary the polar diagram with number envelops, showing the vessel’s capability to keep position or heading with a certain combination of thrusters in operation. The number, type, total power (or thrust) and location of thrusters are vital for estimating the DP capability from the propulsion system. The other equipment is only accessories assisting the DP system. At the end the sea trial may check and confirm the DP class of the vessel. The real capability for station keeping will be verified during normal operation, essentially during emergency situations like electric network faults, propulsion system failure up to damages and fire. It is needed some indexes or parameters during the design process to avoid serious faults. The paper is a probe of becoming familiar with chosen criteria.

Słowa kluczowe

EN

DP systems; station keeping; evaluating criteria; estimation of DP systems

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2013
• Tom: Vol. 20, No. 4
• Strony: 117--122
• Opis fizyczny: Bibliogr. 13 poz., rys.

Twórcy

autor

Herdzik J.

• Gdynia Maritime University, Marine Power Plant Department Morska Street 81-87, 81-225 Gdynia, Poland tel.:[phone], fax: [phone]

Bibliografia

• [1] A Guide to DP Electrical Power and Control Systems, IMCA M206, 2010, www.imcaint. com.
• [2] Dynamic Positioning Systems, Rules for Classification of Ships, part 6, chapter 7, DNV, 2011.
• [3] Pipelaying Vessel Solitaire, Electrical Propulsion System 10kV Supply and Distribution System, SAM Electronics GmbH, Hamburg 2011.
• [4] Herdzik, J., Problems of propulsion arrangement choice of multi-mode ships, Journal of KONES, Vol. 17, No. 2, pp. 129-135, Warsaw 2010.
• [5] Herdzik, J., Problemy utrzymania gotowości eksploatacyjnej jednostek pływających z napędem pędnikami aktywnymi, Logistyka, Nr 2, Pos. 27, pp. 1619-1624, 2010.
• [6] Herdzik, J., Application possibilities of electric driven propulsion of multi-mode ships, Journal of KONES, Vol. 17, No. 1, pp. 163-168, Warsaw 2010.
• [7] Herdzik, J., Possibilities of Improving Safety and Reliability of Ship Propulsion System During DP Operation, Journal of KONES, Vol. 19, No. 2, pp. 219-226, Warsaw 2012.
• [8] Herdzik, J., Challenges of Ship Propulsion Systems During DP Operations, Journal of KONES, Vol. 19, No. 2, pp. 211-218, Warsaw 2012.
• [9] Herdzik, J., Verifications of Thrusters Number and Orientation in Ship’s Dynamic Positioning Systems, The International Journal on Marine Navigation and Safety of Sea Transportation, June 2013.
• [10] Ubisch, von B., Station Keeping Criteria for Dynamically Positioned Ships, Dynamic Positioning Conference, Houston 2004.
• [11] Herdzik, J., Metoda szacowania wymagań stawianych okrętowym układom energetycznym, Logistyka, Nr 3, Pos. 94, pp. 891-898, 2011.
• [12] Verhoeven, H., et al., Safety of Dynamic positioning Operation on Mobile Offshore Drilling Units, DP Conference, Houston 2004.
• [13] Guide to Dynamic Positioning of Vessels, ALSTOM 2000.