南京航空航天大学学报（英文版）2000，Vol.17Issue(2)：124-129,6.
粉体阻尼的多颗粒冲击模型及其仿真研究
MULTI-GRANULE IMPACT MODEL OF NOPD AND ITS NUMERICAL SIMULATIONS
摘要
Abstract
Aiming at the impaction among granules of non-obstructive particle damping(NOPD), the vibration absorption model for vertical impact of granules is established by adopting Hertz contact theory. The numerical imulation of the granules movement process is proceeded, and the vibration response of a free-free uniform beam is obtained for the case when all granules act on it. Through this method, the effect on vibration absorption of impaction is investigated. The simulational data show that multi-granule vertical impaction is not sensitive to the movement clearance. The vibration absorption is also very well when the clearance changes within a large range. Therefore, the phenomenon that the vibration magnitude may increase if the clearance in a single impact body is improperly selected will not happen. The effect of vibration suppression in the range of middle and high frequencies(2 500 ～6 000 Hz) is better than that in the range of low fre quency(＜2 500 Hz). It indicates that the effect on vibration absorption of multi-granule can well restrain the vibration of middle and high frequencies.关键词
冲击阻尼/振动吸收/数值仿真/多颗粒冲击/粉体阻尼Key words
impact damping/vibration absorption/numerical simulation/multi-granule impact分类
信息技术与安全科学引用本文复制引用
徐志伟,陶宝祺,黄协清..粉体阻尼的多颗粒冲击模型及其仿真研究[J].南京航空航天大学学报（英文版）,2000,17(2):124-129,6.基金项目
Supported by National Natural Science Foundation of China(59775019).国家自然科学基金(59775019)资助项目. （59775019）
