Vehicle-induced aerodynamic loads on highway sound barriers part 2: numerical and theoretical investigation
Vehicle-induced aerodynamic loads on highway sound barriers part 2: numerical and theoretical investigation
复制标题
高速公路声屏障上车辆引起的空气动力载荷第 2 部分：数值和理论研究
DOI：
10.12989/was.2013.17.5.479
复制
发表时间：
2013-11
影响因子：
1.6
通讯作者：
Chen, Airong
中科院分区：
文献类型：
--
作者：
Wang, Dalei;Wang, Benjin;Chen, Airong
由于某些公路声屏障仅考虑了自然风荷载，车辆引起的空气动力荷载会对其产生振动。在前人现场试验的基础上，本文采用数值和理论相结合的方法对车辆气动载荷进行了研究。将数值计算结果与实验结果进行了比较，证明了数值计算结果的有效性。通过对数值模拟得到的流场进行分析，证明势流是头部和尾流碰撞的主要来源，从而验证了理论模型。两种方法的计算结果表明，车身长度越短，头部碰撞和尾流碰撞重叠时产生的负压峰值越大，再加上车速较快，尾迹不会脱落，这使得势能假设更加准确。并证明了公路声屏障对车辆所产生的空气动力载荷的期望值。第一部分：现场试验，最大/最小压力与车速的平方成正比，与间隔距离的平方成反比。
The vehicle-induced aerodynamic loads bring vibrations to some of the highway sound barriers, for they are designed in consideration of natural wind loads only. As references to the previous field experiment, the vehicle-induced aerodynamic loads is investigated by numerical and theoretical methodologies. The numerical results are compared to the experimental one and proved to be available. By analyzing the flow field achieved in the numerical simulation, the potential flow is proved to be the main source of both head and wake impact, so the theoretical model is also validated. The results from the two methodologies show that the shorter vehicle length would produce larger negative pressure peak as the head impact and wake impact overlapping with each other, and together with the fast speed, it would lead to a wake without vortex shedding, which makes the potential hypothesis more accurate. It also proves the expectation in vehicle-induced aerodynamic loads on Highway Sound Barriers Part1: Field Experiment, that max/min pressure is proportional to the square of vehicle speed and inverse square of separation distance.
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DOI：
10.1016/0167-6105(94)00115-t
发表时间：
1995-07
影响因子：
4.8
作者：
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通讯作者：
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影响因子：
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发表时间：
2001-12
影响因子：
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10.1016/s0167-6105(96)00106-7
发表时间：
1997-04
影响因子：
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作者：
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通讯作者：
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