Development of RS requirements for the procedure for scanning the ship's hull and assessing the quality of the resulting model for trim and stability calculations

Authors: I.Z. Chereysky, A.A. Petrov, S.V. Brodyansky

Abstract

The article presents the results of the R&D work on the development of the Register requirements for 3-D scanning of the hulls of ships and the quality assessment of the obtained computational models. The analysis of the current regulatory documents of foreign classification societies — IACS members and the existing experience of scanning ship hulls by Russian and foreign companies has been carried out. Two methods for obtaining of the three-dimensional models have been considered: photogrammetry and laser scanning. It has been shown that laser scanning using a lidar is the most optimal for large-capacity vessels. The article also describes a specially developed methodology for the justification of the requirements for the necessary scanning accuracy. Methodology for assessing the quality of the resulting three-dimensional model has been considered separately to estimate the possibility of using it for trim, stability, damage stability calculations and development of onboard stability instruments (loading computers). Finally, the article briefly describes developed draft Register normative document, as well as the results of test scanning of the ship's hull, carried out on the basis whereof.

Keywords: laser scanning, three-dimensional scanning, 3-D-model of ship's hull, lidar, point cloud, stability, damage stability, lines drawing, hydrostatic curves, stability instrument.

References

IMO resolution MSC.436(99). Amendments to the international convention for the safety of life at sea, 1974, as amended. 24.05.2018.

About authors:

LZ. Chereysky - Central Marine Research and Design Institute JSC, St. Petersburg

A.A. Petrov - PhD, Central Marine Research and Design Institute JSC, St. Petersburg

S.V. Brodyansky - Central Marine Research and Design Institute JSC, St. Petersburg

Issue: 64/65 (2021)

For citation: I.Z. Chereysky, A.A. Petrov, S.V. Brodyansky. Development of RS requirements for the procedure for scanning the ship's hull and assessing the quality of the resulting model for trim and stability calculations. Research Bulletin by Russian Maritime Register of Shipping. 2021, No. 64/65, pp. 110-119.

UDC 629.5.011, UDC 629.5.015.1

Pp: 110-119