다물체 동역학 시뮬레이션을 이용한 작동기용 기어박스 가속시험법 검증

초록

Gearboxes designed for reciprocating motion operating mechanisms operate under conditions where boththe load and speed undergo continuous variations. When conducting durability tests on gearboxes designed for suchapplications, operating the target gearbox under conditions similar to the intended usage is essential. The gearboxmust be operated for the required number of cycles to validate its durability under conditions mirroring its intendedusage. This study devised an accelerated test method for gearboxes, which reduces operating angles and operationalstrokes. The reliability of the accelerated test was verified by comparing the stresses imposed on the gears undergeneral and acceleration conditions through multi-body dynamic simulations. The results confirmed that themaximum contact stress levels under normal and accelerated conditions were within a 0.1% error range, indicatinga minimal difference in the gear damage rates. However, a difference in the maximum contact stress resultsbetween the normal and accelerated conditions was observed when inertial forces acted on the output shaft due tothe operational acceleration of the gearbox. Therefore, when conducting this acceleration test, caution should beexercised to ensure that the operational load on the gearbox, which affects inertia, does not significantly deviatefrom the conditions observed under normal operating conditions.

키워드