摘要
针对地铁道床板隔振系统的振动特性和动力响应进行了分析研究,并通过对道床板隔振系统的动态参数进行优化设计,提出了较为完善的技术参数。优化分析结果表明:在选取的参数范围内,其隔振系统的第一阶固有频率都在10 Hz以上,可避开车轮和车轴经过轨道扣件的频率段。如道床垫刚度取0.018 N/mm3,道床板厚度取200 mm,扣件竖向刚度取4.0 k N/mm,则隔振系统的前三阶模态频率分别为14.38Hz、14.57 Hz和16.62 Hz,均在14~17 Hz之间;而在30~35 Hz之间无振型,可有效避开转向架经过轨道扣件的频率。
A comprehensive analysis for vibration characteris- tics and dynamic response of anti-vibration slab system is pre- sented;relatively complete technical parameters are proposed by optimization design for slab dynamic parameters.The analy- sis result suggests that in all the selected parameters;the first natural frequency of anti-vibration system is more than 10 Hz ;just beyond the excitation frequencies when the wheel and axle pass through rail fasteners. If the selected mattress stiff- ness is 0.018 N/mm3;the thickness of slab is 200 mm;the fas- tener stiffness is 4.0 kN/mm;the first three modal frequencies of anti-vibration system will be 14.38 Hz; 14.57 Hz and 16.62 Hz respectively, just between 14 - 17 Hz. There will be no vi- bration type between 30 - 35 Hz; so the selected parameters can effectively avoid frequencies when bogies passing through rail fasteners.
出处
《城市轨道交通研究》
北大核心
2017年第9期86-90,共5页
Urban Mass Transit
关键词
地铁
道床板隔振系统
参数优化
谐振式浮轨扣件
振动响应
metro
anti-vibration slab system
parameter op-timization
tuned damper floating rail fastener
vibration re-sponse
