Lightweight design of ship steering gear foundation

SHE Xiaolin1,2,3,4, YANG Deqing*1,2,3

1 Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China 2 School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China 3 Collaborative Innovation Center for Advanced Ship and Deep-sea Exploration, Shanghai 200240, China 4 China Merchants Cruise Shipbuilding Co.,Ltd., Nantong 226100, China

Abstract: ［Objectives］This study focuses on the process and effects obtained in a lightweight ship foundation design using structural optimization methods.［Methods］Choosing commonly used steering gear foundation as the study object, a FEM model is created in the optimization software Hyperworks, and the sensitivity of plate thickness to stress and weight is analyzed. By dividing the steering gear foundation into separate pedestals, assisted by methods of optimal size and optimal topology, more reasonable foundation shape, plate thickness distribution and lightweight hole locations are obtained, and the maximum lightweight effect is achieved.［Results ］The results show that a weight reduction of 12.61% compared to the initial foundation was achieved by dividing the integral foundation into separate pedestals, a weight reduction of 36.6% was achieved by size optimization, and a weight reduction of 37.7% was achieved by further topological optimization.［Conclusions ］ The process and method of lightweight design given in this paper can provide references for lightweight application in the practical design of equipment foundations on ships. Key words: ship；steering gear foundation；lightweight design；size optimization；topology optimization