Proceedings of the Thirty-second (2022) International Ocean and Polar Engineering Conference
Shanghai, China, June 5–10, 2022
Copyright © 2022 by the International Society of Offshore and Polar Engineers (ISOPE)
ISBN 978-1-880653-81-4; ISSN 1098-6189

www.isope.org

Research and development of cruise weight control system based on weight control technology
Ji Zeng，Yiting Zhan
(College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai，China)

research; The weight data could be accurately controlled and optimized
through software; Accurate statistical calculation and control wasactualized in the construction process, in order to reduce the design andmanufacturing costs of cruise, flexible passenger space could beprovided, which effectively reduced operating costs for operators andincreased operating income..

ABSTRACTIn the whole design and construction process of cruise ships, weightcontrol is a very important and strict work. The weight and gravity centerof a cruise ship has a certain influence on its motion performance,loading capacity, structural strength, navigational safety and economicindicator. We had studied the related technologies of weight control ofcruise ship, including weight control system and its optimization method,weight estimation technology, development of weight control databaseand software system, and expected that the variable load bearing capacity
set at the initial stage of design could be guaranteed after the completionof cruise, thus providing strong technical support for the technicalperformance, design and construction of cruise products.

Research on statistical classification and definition method of
cruise weightThe statistics and classification of cruise weight were the basis of
cruise weight control. First thing we had done was to analyze and study
the classification and detail definition of cruise weight elements; To
count the weight center data of different areas, different status anddifferent majors in order to make corresponding standards anddefinitions. Secondly, we had done the module partition work of wholecruise ship so that each module would have data information such as
module code, major code, group code, grouping code, item code,description, weight condition, source code, state code, state mark, net
weight, tolerance information. Thirdly, we coded according to thedefinition, in this way the system document of weight data had formed.
Then the research and analysis of weight control objects and statisticaltechniques(Qian,2020), weight control methods and processes in eachstage, weight control implementation measures, etc. were also carried out
by us in order to find out the control objects which affected the weightof cruise ships, at last, a document system of weight control objects
formed. We made a system statement document through studying therelationship between each object and weight elements, then establisheda coding system; Through statement analysis, we could find out the keyobjects and elements that affect the weight of cruise ships, so as tooptimize and control this object in order to meet the weight requirementsin the life cycle of cruise ships. The specific process is shown in Figure
1.

KEY WORDS: weight control; tolerance calculation; weightoptimization; cruise ship construction

INTRODUCTION
The weight control of cruise ships is very important for its design andconstruction. If the weight of the empty ship exceeds the design range, itwill not only increase the construction cost (Dennis, 2012), but also leadto the reduction of the cruise ship loading capacity and the decline of its
operational economic indicator; If the center of gravity was too high, its
stability index would drop, which would bring great potential risks tonavigational safety (Neumann, 2004). Therefore, the research on weightcontrol technology in the design and construction of cruise ships could
effectively save the construction cost of cruise ships and improve its
operational economic indicator and navigational safety (Li , 2018). In
this paper, we studied the optimization method of weight control in thewhole process of cruise ships design and construction as well as
considering the difference between equipment initial weight whenordering and its weight when it was transported to the ship yard andinstalled on cruise, in which guided the specific operation of weightcontrol in each link; Then a weight difference adjustment system
document formed as well as a verification & adjustment scheme wasestablished by us, which ensured that the weights of whole process meetthe requirements. On these bases, we controlled and optimized based on
the dimensional chain principle as well as putting forward reliable weightcontrol measures and weight reduction schemes in order to optimize thedesign, improve the economy and safety of cruise ships( Zhang, 2008).
The cruise weight database was established through our theoretical3387