Development of a novel acoustic absorber for the cost-effective reduction of railway noise

近几十年来，公路运输的显著增长带来了不利影响，这突出了铁路作为一种高效和可持续的运输方式的重要性。在英国和欧洲的城市中，交通拥堵损害了高效的工业并导致空气污染。与公路运输相同的吨位相比，铁路产生的污染物要少得多。目前的推动力是解决近期铁路运输整体下滑的问题，并提供一个更高效、更环保的运输系统。然而，阻碍这一显著目标实现的是人们日益认识到铁路噪音对公众健康的影响，这导致沿线居民、政府和卫生组织施加压力，要求增加噪音缓解措施。噪声已被证明是许多铁路网络运营的限制因素，它会增加成本，限制可用性/容量的要求，以及网络扩展的阻力。噪声源可大致分为三类：滚动噪声、牵引噪声（推进）和空气动力学噪声。尽管我们寻求一种整体的方法来解决铁路噪音问题，但人们普遍认为，在40- 250 km/hr的速度范围内，滚动噪音是主要的罪魁祸首。现有的噪音解决方案要么效率低下，要么成本过高。Rosehill Polymers公司建议开发降噪板（NRP）系统并将其商业化：一个成本效益很容易改装的噪音衰减器，从一个novelrecycling制造技术，独家玫瑰山聚合物。我们希望我们的解决方案对铁路网络供应商具有很大的吸引力，并为英国和欧盟的降噪目标做出重大贡献。我们计划产生的总收入为7390万欧元，相关利润约为4300万欧元。实现这些数字将需要在公司内创造45个新的就业机会。

The importance of rail as an efficient and sustainable mode of transport has been accentuatedby the ill effects of significant growth in road transportation in recent decades. Across our UKand European cities, traffic congestion impairs efficient industry and gives rise to airpollution. When compared with carrying the same tonnage by road, rail produces significantlyless pollutants. The impetus now is to address the recent overall decline in rail transport andprovide a more efficient and environmentally friendly transport system.However, standing in the way of this notable goal is the growing awareness of the impact ofrailway noise on public health, which has resulted in pressure from line-side inhabitants,governments and health organisations for increased noise mitigation. Noise is proving to be alimiting factor for many railway network operations; introducing additional costs formitigation, demands for limits on availability/capacity, and resistance to expansion of thenetwork.The sources of noise can be broadly categorised into three groups: rolling noise, traction noise(propulsion), and aerodynamic noise. Although a holistic approach to tackling rail noise issought, it is widely recognised that rolling noise is the predominant offender in the speedrange 40-250km/hr. Existing solutions to noise are either ineffective or exorbitantly costly.Rosehill Polymers is proposing to develop and commercialise the Noise Reduction Panel(NRP) system: a cost effective easily retro-fittable noise attenuator, made from a novelrecycling manufacturing technique, exclusive to Rosehill Polymers. We expect our solution tobe very attractive to the rail network providers and make a significant contribution towardsUK and EU noise reduction targets.We plan to generate total combined revenue of €73.9million, with an associated profit ofroughly €43million. Achieving these figures will require the creation of 45 new jobs withinthe company.