目前在船廠的實務設計作業上，大多先從舯段結構開始設計，因舯段是最關鍵的結構，對後期的設計與施工影響很大，因此舯段結構的設計非常重要。由於舯段結構是由許多相似或相同的結構物組合而成，若是舯段結構設計的主要構件先能有優良的設計，其他相似或相同的構件便能快速且正確的建立，可大幅提高整體船舶設計品質。但在設計初期，許多細部資訊尚未經過完整規劃，無法詳細判斷重要構件的重要設計參數，若是貿然建立重要構件，作出錯誤的判斷，未來勢必要經過更多的修改，浪費設計資源與時間。
以知識工程的方法建立船舶的結構設計知識庫，包括使用者介面、知識庫與推論引擎。使用者介面提供使用者查詢與推論，提供管理者對知識內容與系統做管理。知識庫包括船級法規庫、一般規則庫與自訂標準案例庫三部份，在船級法規方面可在設計送審前，確保主要構件是正確的；一般規則庫用在設計流程方面，存放各船廠依照場地與器材累積的施工與設備經驗；自訂標準案例庫將各構件本身與相關設備的設計經驗搜集整理，使得設計初期便能取得足夠的資訊作為設計依據。將所有相關知識整理於知識庫中，依照知識庫中知識所建立的規則，加以推論作為設計的依據。
藉由知識庫系統協助進行船舶設計流程改善，使設計人員在設計初期的建模期間，經由知識庫系統中查詢船級法規或是規定。以知識庫系統得到快速合宜的建議與支援，加強整合設計資訊，針對各船級法規及規定直接設計，避免設計過程中發生不良或錯誤，減少重覆修改設計及重複建模的步驟，提升設計初期的建模的品質，藉以縮短設計時程。

The midship is always considered the most critical part of a ship, therefore, most of the shipyards start the ship design from that. Since the structure of the midship is usually built from the same or similar components, with a proper design of them, the midship design can be done not only faster but also less problems. which is an important improvement of the ship design. However, because of some details are not available at the first phase, it is usually very difficult to determine the corresponsive relationships among some key components.
The design ship structure knowledge-based system based on knowledge-based engineering is including user interface, knowledge base, and inference engine. The user interface provides user search and reference, and administrator management the system. The knowledge-base includes three parts. They are classification rule base, common rule base, and standard practices. The classification rule base ensures the components are correct even before sending the design to the classification societies. The common rule base is based on the previous experience of ship building procedure. The standard practices is built upon collecting the information of all the components and related outfits. It can provides great amount of the reference for designing from the beginning.
It goes without saying, by using the knowledge-based system can improve the workflow of the ship design. Designers can learn the rules and regulations from the knowledge base from the modeling stage. The knowledge base system can provide not only proper reference, suggest and supports but also integrated the design, especially, the rules related to the design which can avoid lots of the mistakes in design and reduce the pre-production time. By increasing the quality of the design and modeling, the whole building time can be reduced dramatically.

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