Development of an Innovative Measurement Technology and a High-Accuracy Theoretical Estimation Method for Ship Advancing in Waves

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H01547
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 24020:Marine engineering-related
• Research Institution: Hiroshima University
• Principal Investigator: Iwashita Hidetsugu 広島大学, 先進理工系科学研究科(工), 教授 (60223393)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: FBG圧力センサー / 非定常圧力 / Added pressure / 抵抗増加 / ランキンパネル法

Outline of Final Research Achievements

In order to measure the pressure acting on the hull surface of a ship navigating in waves as a surface distribution, we have developed an FBG pressure sensor (ver. 7) that is less affected by temperature interference, and established a measurement method and data analysis technology using it. By attaching 379 pressure sensors we developed to one side of the ship model and measuring the pressure distribution at various wavelengths in regular head-waves, the accuracy of the pressure sensors and/or measurement/analysis method was confirmed. On the other hand, we have developed a method to accurately calculate steady disturbance effects in theoretical calculations using the Rankin panel method based on the simple combined method, and confirmed its effectiveness by comparing the pressure distribution measured by the FBG pressure sensors.

Free Research Field

工学

Academic Significance and Societal Importance of the Research Achievements

船舶を含めた輸送機器の開発や設計において、その表面の圧力分布を知ることは、流体解析を受けて行われる構造解析にも関連して究極的に重要である。これまで波浪中を航走する船舶の圧力の面分布計測は困難であったが、本研究で開発した温度干渉影響の少ないFBG圧力センサーを用いることによりそれが可能となった。これにより、計測された圧力面分布データが実用上の波浪荷重等構造設計に直接的に利用できるようになっただけでなく、学術的には数値シミュレーション等の詳細な検証用データとして活用することができるようになった。