고속 및 장거리 기동헬기 휠 브레이크 조립체의 열-기계 연성해석과 성능 검토

초록

This study presents a thermomechanical analysis of a wheel brake assembly for high-speed tactical helicopters, where frictional heating during braking poses critical risks such as fade, thermal deformation, cracking, wear, and judder. A two-dimensional axisymmetric finite element model is developed to balance computational efficiency with thermal fidelity. Two heat flux formulations are compared: a conventional uniform model based on global average contact pressure and a pressure-dependent non-uniform model with radially segmented heat fluxes weighted by local contact pressure distribution. Braking energy corresponding to the top-level requirements of Korea Aerospace Industries is applied to both models. The non-uniform model yields higher localized temperatures and steeper radial gradients, more accurately capturing contact pressure concentration near the rotational axis. The results indicate that all components of the aircraft wheel brake assembly satisfy thermal stability requirements.

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