一种在道砟下采用沥青基层的有砟轨道动力学模型

• 作 者: 杨璟旻
• 机 构: 中铁二院武汉勘察设计研究院有限责任公司,
• 出 处: 四川建材
• 发表日期: 2014年01期
• 关键词: 沥青碎石基层 有砟轨道 沥青碎石 轨道模型 钢轨 轨枕 力学性能 分析模型 技术目标 相互作用

在道砟下采用沥青基层的有砟轨道具备一些力学和环境保护方面的优势。在道砟下采用沥青基层的有砟轨道的分析模型中,钢轨被视为离散点支承的黏弹性连续梁,轨下为四层弹簧-阻尼振动模型。该模型被用于是否采用道砟下沥青基层的有砟轨道的力学性能比较。结论表明道砟下采用沥青基层的有砟轨道降低了地面的动力效应,达到了降低传递至地面的振动和提高轨道的设计寿命的技术目标。

The use of ballasted ballast tracks under pavement has some mechanical and environmental advantages. In the pavement model with bitumen base in ballast, the rail is regarded as a viscoelastic continuous beam supported by discrete points and a four-layer spring-damped vibration model under the rail. This model is used to compare the mechanical properties of ballasted orbits with asphalt underpasses. The conclusion shows that the use of bitumen orbit of asphalt pavement reduces the dynamic effect of the ground and achieves the technical goal of reducing the vibration transmitted to the ground and increasing the design life of the track.