In this study, an optimized design of a triaxial load cell has been developed by the use of finite element analysis, design of experiment and response surface method. The developed optimal design was further validated by both stress-strain analysis and natural vibration analysis under an applied load of 30 ㎏f. When vertical, horizontal, and axial loads of 30 ㎏f were applied to the load cell with the optimal design, the calculated strains were satisfied with the required strain range of 500×10-6±10%. The natural vibration analysis exhibited that the fundamental natural frequency of the optimally designed load cell was 5.56 ㎑ and higher enough than a maximum frequency of 0.17 ㎑ which can be applied to the load cell for wind-tunnel tests. The satisfactory sensitivity in all triaxial directions also suggests that the currently proposed design of the triaxial load cell enables accurate measurements of the multi-axial forces in wind-tunnel tests.
