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Dynamic modeling of traffic noise in both indoor and outdoor environments by using a ray tracing method

机译：使用光线跟踪方法在室内和室外环境中对交通噪声进行动态建模

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摘要

The complexity of the urban environment and traffic characteristics give the dynamic simulation of traffic noise practical significances. A new dynamic modeling of traffic noise in both indoor and outdoor environments was proposed. First, considering multiple reflections and diffractions, 3D ray tracing method subordinated to space partitioning was used to simulate sound propagations. Then, microscopic traffic simulation which provided time-variant parameters for the vehicle emission model, was used to gain spatial and temporal outputs. Space partitioning improved the computational efficiency by transforming the global search into a local one in complex sound propagation simulation. A case was validated the accuracy, as the indoor and outdoor average errors of equivalent sound levels (L-eq) were respectively 1.68 dB and 1.65 dB. Moreover, less than 1.5 dB errors of statistical indicators (L-90, L-50 and L-10) and well coincidence of statistical distributions of the instantaneous sound pressure levels (L-eq,L-1s) illustrated a good performance on dynamic simulation. Finally, the effects of vehicle speed, proportion of heavy vehicles and signal phase on traffic noise were discussed. The results showed that 1) Indoor/outdoor L-eq had logarithmic relationships with vehicle speed. 2) It presented quadratic polynomial relationships between Leg and proportion of heavy vehicles. 3) Dynamic results showed that noise variations were consistent with the changes of the signal period, and it revealed different noise distributions with various vehicle statuses; upstream average L-eq was 3.3 dB louder than the downstream one with vehicle acceleration; average L-eq,L-1s during the red light was 20 dB softer than it during the green light. (C) 2017 Elsevier Ltd. All rights reserved.
机译：城市环境的复杂性和交通特征为交通噪声的动态模拟提供了现实意义。提出了室内和室外环境中交通噪声的动态模型。首先，考虑到多次反射和衍射，从属于空间划分的3D射线追踪方法被用来模拟声音传播。然后，使用微观交通仿真为车辆排放模型提供时变参数，以获取空间和时间输出。通过在复杂的声音传播模拟中将全局搜索转换为局部搜索，空间划分提高了计算效率。验证了一种情况的准确性，因为等效声级（L-eq）的室内和室外平均误差分别为1.68 dB和1.65 dB。此外，统计指标（L-90，L-50和L-10）的误差小于1.5 dB，瞬时声压级的统计分布（Leq，L-1s）的一致性很好，说明了动态效果良好。模拟。最后，讨论了车速，重型车辆比例和信号相位对交通噪声的影响。结果表明：1）室内/室外Leq与车速成对数关系。 2）提出了腿与重型车辆比例之间的二次多项式关系。 3）动态结果表明，噪声变化与信号周期的变化是一致的，并且揭示了不同车辆状态下的噪声分布；车辆加速时，上游平均L-eq比下游平均L-eq高3.3 dB；红光期间的平均L-eq，L-1s比绿光期间的平均L-eq，L-1s低20 dB。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Building and Environment》 |2017年第8期|225-237|共13页
  • 作者

    Hou Qing; Cai Ming; Wang Haibo;

  • 作者单位

    Sun Yat Sen Univ, Sch Engn, Guangzhou, Guangdong, Peoples R China|ITS, Guangdong Prov Key Lab, Guangzhou, Guangdong, Peoples R China|Guangdong Prov Engn Res Ctr Traff Environm Monito, Guangzhou, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Sch Engn, Guangzhou, Guangdong, Peoples R China|ITS, Guangdong Prov Key Lab, Guangzhou, Guangdong, Peoples R China|Guangdong Prov Engn Res Ctr Traff Environm Monito, Guangzhou, Guangdong, Peoples R China;

    Sun Yat Sen Univ, Sch Engn, Guangzhou, Guangdong, Peoples R China|ITS, Guangdong Prov Key Lab, Guangzhou, Guangdong, Peoples R China|Guangdong Prov Engn Res Ctr Traff Environm Monito, Guangzhou, Guangdong, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Traffic noise; Ray tracing method; Dynamic simulation; Indoor and outdoor environments; Signal-controlled junction;

    机译：交通噪声射线追踪法动态仿真室内外环境信号控制路口;

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