爆発衝撃を受けた車体の運動を模擬するためのシーソー実験装置に関する研究

抄録

Improvised explosive devices (IEDs) have inflicted severe injuries on vehicle occupants in recent conflicts. This study aims to develop a shock‑absorbing seat mechanism to mitigate such injuries. To evaluate its effectiveness, a seesaw‑type impact testing apparatus capable of reproducing upward blast‑induced shocks was constructed. Conventional drop tests using scaled vehicle models often fail to reproduce realistic impulse transmission and the longer impulse duration characteristic of actual blast loading, even when the peak acceleration is matched, resulting in overall dynamic behavior that differs substantially from that observed in real blast events. To address these constraints, numerical simulations were performed to estimate localized blast pressures and the rotational tendencies associated with different explosive positions, thereby providing reference information for determining appropriate conditions for the seesaw experiments. Comparison of the results obtained from the seesaw tests and the blast experiments confirmed that the seesaw‑based tests can reproduce both the vertical and rotational motions of vehicle models observed in real explosions. These findings indicate that the proposed seesaw‑type apparatus is a viable alternative to direct explosive testing.