Tham khảo tài liệu 'lesson 5- hull construction(2)', ngoại ngữ, anh văn thương mại phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Lesson 5- Hull Construction 2 In addition to shell structure there are bottom structure side structure deck structure bulkhead structure bow and stern structure and superstructure too. Ship bottom will normally be in two different patterns single bottom and double bottom. The double bottom is devised to carry oil and water so as to make full use of bottom space as well as to lower gravity center improve on seakeeping performances and adjust trim and heel through ballast water. In the bottom structure the central stringer is a longitudinal member located at the centreline of bottom from bow to stern which assures you of the total longitudinal strength of hull. Side girders are also longitudinal members situated at both sides of the centreline of bottom which mainly withstand the total longitudinal bend. Floor plates play the part of chief transversal members at the bottom which are subjected to water pressure and gravity of cargoes and equipment as well as local external forces. They shoulder the responsibility of transversal and local strength of bottom. Besides inner bottom longitudinal and inner bottom plates and the like will also be adopted for the bottom structures as well. As it were the side structures port and starboard are two side walls of hull symmetrical to each other and among the side structures leading components are the frames that bear water pressure and secure the transversal and local strength of hull. Side structures are subdivided into two models i. e. the transversal framing and the longitudinal framing. With regard to the deck structure it is made up of deck plates beams deck girders deck longitudinal hatch trunks pillars and other members. Fig. 5. 1 Hull s main member In dealing with the deck structure one thing is very interesting that is the arc from port to starboard is termed as camber while that from bow to stern is called sheer. Next comes the bulkhead structure which may assume the forms of either plain plate with stiffeners or .
