Research And Design Of Marine Deck Derrick Teaching Aids

Deck Crane is one of the most important ancillary equipment in marine engineering ship. Marine deck derrick crane, because of its simple structure, low cost, easy maintenance, and some other advantages, is widely equipped in bulk vessels. As "People’s Republic of China crew training management rule" required, the working principle, application methods and operating precautions of derrick crane are the skills that marine majors should master. Now, almost all maritime universities would allocate a certain part of the teaching hours to carry out theoretical courses and practical exercises when they make professional teaching plans. However, students in current domestic colleges and universities (including Dalian Maritime University), can only learn the operation of derrick crane by video due to the lack of a workable derrick crane teaching aid. It is lack of intuitive and direct operating experience and cannot achieve a better teaching result as well. Therefore, it is urgent to develop a workable teaching aid for derrick crane, including single-derrick system and dual-derrick system.This paper discusses single-derrick crane and dual-derrick crane systematically and comprehensively from these aspects:theoretical analysis and calculation, components design and selection, FEM analysis and simulation, electrical design and so on. And finally delivered a laboratory used single-derrick and dual-derrick crane system for teaching equipment. Students can learn derrick crane practically through this equipment. It improve the ocean development and marine personnel training. Meanwhile, this paper also provides a reference method for design of single-derrick and dual-derrick. It is significant.Firstly, it analyzes and calculates the key components of single and dual derrick, establishes the mechanical model and then analyzes and calculates then theoretically, including crane boom, stable cable and other key components, sums up a practical calculation methods and formulas, provides a theoretical basis for single and dual derrick design;Secondly, use the calculated results to design the key components of derrick crane combining with the operating parameters and features, determine the sizes and requirements of self designing parts and standard parts. Provide a reference method for actual design.Third, create the 3D model of the derrick system, and import the model of the key components to the finite element software for finite element calculation and analysis, verify the correctness of the design methods and results, to ensure safety and reliability;Finally, design the control system of derrick system, determine electrical parameters and control requirements combining with practical applications and features, output the control schematic of single hoist control system, provide theoretical support for the whole system.