PERFORMANCE EVALUATION OF POLYETHYLENE OYSTER-FARMING RAFT USING TIME-DOMAIN ANALYSIS

Abstract

 In raft-style oyster farming, oysters are suspended from rafts formed by multiple bamboos. Rafts have been damaged from typhoons, which is having a negative impact on ship navigation and the marine environment. Therefore, rafts made of highly flexible PE pipes have been developed with the aim of improving wave resistance. It is also expected to improve the growth of oysters. Therefore, we compared the raft's wave resistance and oyster growth performance with bamboo. A time-domain analysis was performed to comparatively evaluate the bending stress generated in regular waves. We also evaluated the durability of the PE raft during stormy weather. These results showed that PE was more durable than bamboo and had better growth performance for oysters. Furthermore, the PE rafts were also found to be more durable in stormy weather.