CAJ | 학술논문

转轴是JD?1轮轨模拟试验机夹具的重要组成部分，在试验机运行过程中承受垂向载荷和制动扭矩的综合作用。针对轮轨模拟试验机转轴－轴承过盈配合面上出现的损伤，从宏观、微观层面分析其损伤机制。转轴和轴承内圈在试验机运行过程中发生的弹性变形量存在差异，导致转轴－轴承过盈配合面区域内出现微小幅度的往复相对运动，从而产生微动损伤。在载荷综合作用下，转轴－轴承过盈配合表面出现了严重的微动疲劳磨损和较为严重的不均匀塑性变形，靠近制动器一端的表面塑性变形不均匀程度更为严重。分析结果为转轴损伤的减缓和预防提供了参考。
전축시JD?1륜궤모의시험궤협구적중요조성부분，재시험궤운행과정중승수수향재하화제동뉴구적종합작용。침대륜궤모의시험궤전축－축승과영배합면상출현적손상，종굉관、미관층면분석기손상궤제。전축화축승내권재시험궤운행과정중발생적탄성변형량존재차이，도치전축－축승과영배합면구역내출현미소폭도적왕복상대운동，종이산생미동손상。재재하종합작용하，전축－축승과영배합표면출현료엄중적미동피로마손화교위엄중적불균균소성변형，고근제동기일단적표면소성변형불균균정도경위엄중。분석결과위전축손상적감완화예방제공료삼고。
As an important part of the fixture of simulation testing facility for wheel/rail, the shaft is subjected to the vertical loads and braking torque during the operation of the machine. The damage analysis of the shaft was presented in macro and micro level to investigate the damage mechanism of interference fit surface between the shaft and bearing. The results show that there exists the fretting damage on interference fit surface of the shaft due to the difference in the elastic deformation and the relative motion with reciprocating micro amplitude of the shaft and the bearing inner ring. And there exists serious non?uniform plastic deformation on interference fit surface, especially on the surface near the end of the brake. The analysis results provide the beneficial reference for the damage mitigation and prevention of the shaft.