Accurate and fast coupled current density-thermal conduction-structure analysis inside the human body during high-voltage electric shock

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K21281
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 1001:Information science, computer engineering, and related fields
• Research Institution: Akita National College of Technology
• Principal Investigator: Nomura Masamune 秋田工業高等専門学校, 創造システム工学科、電気電子情報系, 助教 (90967259)
• Project Period (FY): 2022-08-31 – 2024-03-31
• Keywords: 数値人体モデル / 感電解析 / 電気-熱-構造連成解析 / 並列計算 / ADVENTURE / 大規模計算

Outline of Final Research Achievements

In this study, we developed a coupled "electrostatic field" - "thermal" - "structural" analysis method　for human bodies using the ADVENTURE system. The introduction of parallel computers into ADVENTURE has significantly reduced the computation time for structural analysis using numerical human body models, which had been a bottleneck. The numerical analysis of "static electric field" - "thermal" showed that little thermal effect was obtained in the case of 100 V electric shock in the home, but a significant difference in the thermal effect inside the human body was observed for those caused by 6,600 V wires. Next, in the case of an electric shock in a 22,000 V substation, heat was found to diffuse instantaneously from the electrocuted area. Next, the "thermal" - "structural" analysis was found to have significantly worse convergence and increased computation time.

Free Research Field

計算科学

Academic Significance and Societal Importance of the Research Achievements

本研究は、まず、数値人体モデルの問題点である、辺接触・点接触境界を面接触に修正することで表面境界を抽出したモデルを作成できた。本モデルは、「電磁界」、「音響」、「静磁界」など様々な他の数値解析に関する研究に応用することができる。また、本解析の一旦（例えば「静電界」-「熱」）を示すことで、電気作業員の感電に関する危機意識の教育につながると確信している。さらに、本解析では、数値人体モデルの熱応力解析では静電界・熱よりも大幅に計算時間が悪くなるという新たな課題も見出すことができ、おそらく世界で初めて人体モデルを丸々用いた「静電界」-「熱」-「構造」連成解析の第一次的な近似である数値解析例である。