铁道科学与工程学报2018，Vol.15Issue(1)：64-70,7.
黄土边坡自振特性影响因素分析
Analysis of influence factors on natural vibration characteristics of loess slope
摘要
Abstract
The dynamic characteristics of the slope are the internal factors that affect the dynamic response and play an important role in the dynamic stability of the slope. In this paper, used ANSYS large-scale general finite element analysis software, conducted modal analysis for different slope height and gradient of loess slope, discussed the influence of height and gradient for loess slope natural vibration frequency. The results showed that:under the condition of slopes with different height and gradient, the first 10 order natural vibration frequency of loess slope increased as the frequency orders increased. The influence of slope gradient for every order natural vibration frequency is small relatively and slope height is large. With the increase of slope gradient, the fundamental frequency has an increase, but the increase is not large. Under the same slope gradient and different height, the maximum value of the relative change rate of fundamental frequency is only 6.80%. Slope height has a large influence for fundamental frequency, it will decrease with the slope height increase. The relative change rate of fundamental frequency is 49.95%~50.02% in the same slope gradient and different slope height. The research can provide reference for avoiding the occurrence of resonance in the seismic design of loess slope.关键词
黄土边坡/自振特性/模态分析/ANSYSKey words
loess slope/self vibration characteristics/modal analysis/ANSYS分类
建筑与水利引用本文复制引用
孙纬宇,严松宏,欧尔峰,宋旭辉..黄土边坡自振特性影响因素分析[J].铁道科学与工程学报,2018,15(1):64-70,7.基金项目
国家自然科学基金资助项目(51268030) （51268030）
甘肃省科技计划资助项目(1310RJZA041) （1310RJZA041）
