CAJ | 학술논문

为了研究列车碰撞过程中的钩缓装置行为，提出了一种基于LS-DYNA离散梁单元模拟钩缓特性的仿真方法。以某6节编组的城市地铁列车36 km/h对撞工况为例，对钩缓装置的加载、卸载以及在极限载荷下的失效脱落等现象进行模拟，并计算钩缓装置对列车碰撞工况能量吸收的贡献程度。结果表明：该方法能够模拟碰撞时列车钩缓装置的力学特性以及车钩的失效和脱落现象，并且能得到连挂列车各位置钩缓装置的输出特性、能量吸收等指标；两列车对撞后，钩缓装置在碰撞过程中吸收能量占总能量的27％。
위료연구열차팽당과정중적구완장치행위，제출료일충기우LS-DYNA리산량단원모의구완특성적방진방법。이모6절편조적성시지철열차36 km/h대당공황위례，대구완장치적가재、사재이급재겁한재하하적실효탈락등현상진행모의，병계산구완장치대열차팽당공황능량흡수적공헌정도。결과표명：해방법능구모의팽당시열차구완장치적역학특성이급차구적실효화탈락현상，병차능득도련괘열차각위치구완장치적수출특성、능량흡수등지표；량열차대당후，구완장치재팽당과정중흡수능량점총능량적27％。
In order to study the behaviors of couplers and buffers (CABs)accurately in the process of train collision,a new simulation method for analyzing the characteristics of CABs was proposed based on the discrete beam in LS-DYNA. This method was then verified through a case study where a head to head collision between two identical subway trains marshaled by 6 cars occurred under a scenario with a relative speed of 36 km/h. The CABs'loading and unloading conditions,as well as their failure and falling-off behaviors under the ultimate load were simulated,and the contribution of CABs in the total energy absorption of the train collision was analyzed. The results show that the proposed method can simulate effectively the mechanical properties of CABs and couplers'failure and falling-off behaviors in the train collision. In addition,it can be used to obtain the indexes such as output characteristics and energy absorption of CABs in different positions. During the train collision,the energy adsorbed by the CABs accounts for 27% of the total energy.