摘要
为研究阻尼钢轨的减振降噪性能,以标准钢轨和迷宫式约束阻尼钢轨为研究对象,通过在消声室内测试标准钢轨和迷宫式约束阻尼钢轨的振动与噪声特性,实验结果表明：阻尼钢轨具有良好的减振降噪效果,阻尼钢轨在全频段内有效地抑制振动和噪声。在径向冲击荷载下,迷宫式约束阻尼钢轨相对于标准钢轨的振动加速度衰减量为5%~19%,振动时间衰减量都大于94%,总噪声级降低达9 d B以上;在轴向的冲击荷载下,迷宫式约束阻尼钢轨相对于标准钢轨的振动加速度衰减量为9%~21%,振动时间衰减量都大于92%,总噪声级降低达5 d B以上。实验结果为新型约束阻尼钢轨的优化设计提供了更加准确的实验依据。
To study the vibration reduction performance of damped rail, this study takes the standard rail and labyrinth constrained damped rail as the study target. By testing the vibration performance of both standard rail and labyrinth constrained damped rail in an anechoic room, it uses the time-domain analysis to study the vibration changes with time passing. Results show that： the labyrinth constrained damped rail vibration can effectively reduce the vibration amplitude and duration. Under the radial impact load, compared with the standard rail, vibration acceleration attenuation of the labyrinth constrained damped rail is 5%-19% with time of vibration and attenuation greater than 94%, and the total noise level reduction can be up to above 9 d B; under the axial impact load, compared with the standard rail, vibration acceleration attenuation of the labyrinth constrained damped rail is 9%-21% with time of vibration and attenuation greater than 92%, and the total noise level reduction can be up to above 5 d B. The experimental results provide a more accurate experimental basis for the optimal design of a new type of constrained damping rail.
出处
《华东交通大学学报》
2016年第4期31-36,共6页
Journal of East China Jiaotong University
基金
国家自然科学基金项目(51578238)
铁路环境振动与噪声教育部工程研究中心资助项目(15TM02)
关键词
阻尼钢轨
室内测试
时域分析
减振
噪声级
damped rail
indoor test
time domain analysis
vibration reduction
noise level
