Outdoor Sound Propagation Modelling Across Scales with Uncertainties

具有不确定性的跨尺度室外声音传播建模

• 批准号: 1763023
• 金额: --
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1763023
• 关键词: Outdoor; Sound; Propagation; Modelling; Across

The proposed project sets the following four objectives:1. To study the uncertainties in the meteorological, ground and other environmentdata which are used to model short, medium and long range outdoor soundpropagation.2. To determine through modelling the influence of uncertainty in the input modelparameters on the accuracy of the model predications for sounds emitted by agiven military platform.3. To develop and integrate several propagation models in one Universal ModellingTool for Outdoor Sound Propagation (UMTOSP) which is accurate over a range ofscales within the agreed bounds.4. To validate the UMTOSP and demonstrate the accuracy and flexibility in terms ofcalculating the sound resulting from a range of military platforms and in thepresence of realistic uncertainty in data.The work will be built on the latest developments in acoustic propagation modelling. Thenew universal model which will be developed as a result of the project will be user-friendlyand it will be able to calculate outdoor sound at one or more positions in range and heightfrom a broad range of sources, in a representative range of environments, at differentscales, on ground and at low and high altitudes.This part of the project will include a detailed investigation into the capabilities of differentpropagation models but, for the purposes of planning the project it is expected that theUMTOSP is based on:i. robust analytical models (e.g. [4,5]) to calculate short range sound propagationwhen the ground impedance effect is dominant;ii. energy-based boundary element methods to study short and middle rangesound propagation from complex sources and in the presence of complexterrain and strong ground impedance effects (e.g. [6]);iii. green's function, or time domain finite differences, parabolic equation methods(e.g. [7,8]) when medium and long range propagation in the presence ofcomplex terrain is affected by the meteorological conditions.In this way, the models should include effects observed at short range, 10s to 100s ofmetres, such as the presence of local topography or buildings, medium range, 100s to 1000s of metres, such as ground impedance, wind conditions, and long range, 1000s to10,000s (and more) of metres, such as temperature and wind profile.The sensitivity of these models (and the universal model) to the uncertainties in the inputdata will be studied using the Bayesian approach (e.g. [9]); this will enable us tounderstand the errors in the calculations these models produce when inaccurate or timevariantsets of source, meteorological, topographical and ground type input data are inputfor a given source / receiver geometry.When combined in one UMTOSP these models will enable us to calculate soundpropagation (for the first time) in an environment of any complexity and with a minimumnumber of parameters within the set accuracy limits and propagation ranges.The main output from the project would be software code for the UMTOSP that could, ifappropriate, be used as the basis for a tactical decision aid.

提议的项目设定了以下四个目标：1。为了研究气象，地面和其他环境数据中的不确定性，用于建模短，中和远距离的户外声音流动。2。通过建模输入模型参数中不确定性对模型谓词的准确性的不确定性对Agiven Morcial Platform发出的声音的准确性3。为了在一个通用模块化工具中开发和集成几个传播模型，以进行户外声音传播（UMTOSP），该模型在约定的边界内的各种范围都准确。4。为了验证UMTOSP并以量度估算由一系列军事平台和数据中现实不确定性产生的声音来证明其准确性和灵活性。这项工作将基于声学传播建模的最新发展。当时将因项目而开发的通用模型将是用户友好的，并且能够在范围内的一个或多个位置以一个或多种来源的高度来计算户外声音，在各种环境中，在不同的环境中，在不同的环境中，在不同的基础上和低位上，该项目的详细范围都在于计划的详细范围。 Theumtosp基于：i。强大的分析模型（例如[4,5]）计算地面阻抗效应是主要的； ii。基于能量的边界元素方法，用于研究复杂来源和存在络合物和强大的地面阻抗效应的短和中间流程传播的方法（例如[6]）； iii。格林的功能或时间域有限差异，抛物线方程方法（例如[7,8]）当中等和长范围的繁殖受到气象状态的影响时，该模型应在短范围内观察到的效果，包括10s到100s到100 s的效果，例如本地台式或构建的情况，例如中等范围，以1000 sembleding of Medifors of Medifors of Medifors，Impsight of Medife and Impertions，Inf in Medifors in Medife of Medibles，Impertions in Medife and Impersions，Imp sef。远距离，1000至10,000米（以及更多）米，例如温度和风轮廓。这些模型（以及通用模型）对输入data中不确定性的敏感性将使用贝叶斯方法研究（例如[9]）； this will enable us tounderstand the errors in the calculations these models produce when inaccurate or timevariantsets of source, meteorological, topographical and ground type input data are inputfor a given source / receiver geometry.When combined in one UMTOSP these models will enable us to calculate soundpropagation (for the first time) in an environment of any complexity and with a minimumnumber of parameters within the set accuracy limits该项目的主要输出将是umtosp的软件代码，如果适当的话，可以用作战术决策援助的基础。