| Summary: | 碩士 === 國立臺灣海洋大學 === 機械與輪機工程學系 === 93 === Currently, the hatchway cover used in FRP and large iron ships is to prevent seawater from pouring into the inside of cabins, leading to rust or corrosion of inner decoration. It could also cause a serious damage on the freezing equipments. Therefore, the water tightness, corrosion resistance, operation flexibility, and safety are quite critical on the application of hatchway covers. At this moment there is lack of design standard to follow up in the development of hatchways. However, it has been found that some disadvantages are existed in the current applications. For example, the operation flexibility and water tightness are not good enough, the service life is short, the safety on operation is concerned, and the hatch is cumbersome.
In this study a new hatch system was developed to overcome the existed drawbacks. Its framework was founded on theories and methodology of industrial design. Quality Functional Deployment (QFD) analysis was utilized to realize the engineering manipulations. In addition, the innovative TRIZ methodology was applied to solve the engineering problems. As a result, the new hatch system was worked out. The material adopted in the new system was 5083 aluminum alloy, which has good properties on corrosion resistance. The whole system included the design of spring-assistance bouncing mechanism, transmission and quick locking mechanism, and so on. In addition, the 3-D models for all components used in the system were generated by a computer graphic software. Following the generation of 3-D models, computer-aided engineering (CAE) tools were employed to analyze the linkage assemblage, animation, and interference of the developed mechanism. Finally, a prototype of the new system was fabricated by a co-operative firm. In order to make sure its suitability, a serious of hydraulic tests was conducted to test the fabricated. The test results revealed that the system has been fit in with the requirements of Load Line Convention. As a result, the design methodology developed in this project could serve as a reference material for designing the system of hatchway covers in the future.
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