CAJ | 학술논문

为了研究车下有源振动设备对车体振动的影响，通过对沪宁线CRH2C型动车组的线路试验，重点分析了换气装置旋转动不平衡以及风道颤振对换气装置和车体振动的影响。通过对比分析停车工况和运行工况下除尘前和除尘后换气装置和车体振动加速度的变化情况，得到换气装置旋转动不平衡对换气装置和车体振动的影响规律。分析结果表明，换气装置旋转动不平衡对换气装置本身以及车体的振动都有一定的影响，而除尘能够降低换气装置风机叶片上的旋转动不平衡量，进而能够大大降低换气装置旋转动不平衡对换气装置和车体振动的影响。同时由于换气装置内空气非稳态流动导致风口处产生压力波动，致使换气装置与车体连接风道产生高频颤振，也会对换气装置和车体振动造成重大影响。
위료연구차하유원진동설비대차체진동적영향，통과대호저선CRH2C형동차조적선로시험，중점분석료환기장치선전동불평형이급풍도전진대환기장치화차체진동적영향。통과대비분석정차공황화운행공황하제진전화제진후환기장치화차체진동가속도적변화정황，득도환기장치선전동불평형대환기장치화차체진동적영향규률。분석결과표명，환기장치선전동불평형대환기장치본신이급차체적진동도유일정적영향，이제진능구강저환기장치풍궤협편상적선전동불평형량，진이능구대대강저환기장치선전동불평형대환기장치화차체진동적영향。동시유우환기장치내공기비은태류동도치풍구처산생압력파동，치사환기장치여차체련접풍도산생고빈전진，야회대환기장치화차체진동조성중대영향。
In order to study effect of active vibration equipments to carbody vibration ,analyzes the influence of unbalance in venti-lation device and wind tunnel flutter to equipments and carbody vibration through line test of CRH 2C on the Shanghai-Nanjing.By comparing the vibration change on ventilation device and carbody between before dust removal and after dust removal ,the law is investigated of rotating dynamic imbalance to equipments and carbody vibration .The results showed that the dynamic imbalance of ventilation device to itself and carbody vibration have a certain influence .Dust removal can reduce the dynamic imbalance of ven-tilation device rotating fan blades;thereby greatly reduce the influence of ventilation device imbalance to equipments and carbody vibration.At the same time there is a significant influence on ventilation device itself and carbody vibration ,since the air unsteady flow in ventilation devices generated pressure fluctuations at air opening position ,resulting in high-frequency flutter of wind duct between equipments and carbody .