Fabrication and optimization of polymeric accoustic foams with structural fonctionality (I2I Phase I)

蒙特利尔理工大学根据航空工业的需要开发了一种新型吸声泡沫。热固性聚合物开孔泡沫在宽频率范围内，特别是在低频率下显示出优异的吸声系数。此外，重量轻，机械强度高。泡沫机械性能对于航空发动机、地板系统和机身的应用是有吸引力的。制作工艺简单可靠。航空和建筑领域的声学专家已经认识到拟议产品的潜力，并已申请临时专利。该项目的目的是通过在相关环境中验证该技术，在工业化之前响应工业要求。目的是证明制造工艺参数是完全受控的，并且这些热固性泡沫遵守工业上的声学、物理和机械规范。该项目将展示使用经过飞行认证的热固性树脂制造这些低成本声学泡沫的好处。将优化制造工艺。将生产大样本。将测试不同的树脂系统和泡沫结构。声学性能、机械性能和适航性将通过实验进行评估。将验证声学预测工具的有效性。将测试在代表性航空航天夹层结构中的集成。这项新技术将有助于211 000个就业机会和28 G$加拿大航空航天工业的经济健康和增长。它提供了一种限制国际民用航空组织谴责的“与机场运营和扩建有关的不良社会反应”的手段。减少飞机噪音是制造商和机场管理者的首要任务和关键的环境目标。

A novel acoustic foam was developed by Polytechnique Montreal in response to the needs of the aviationindustry. The thermoset polymeric open-cell foam shows excellent acoustic absorption coefficient in broadfrequency range, and particularly at low frequencies. Further, is light and mechanically strong. The foamsmechanical properties are attractive for applications in aircraft engines, flooring systems and fuselage. Thefabrication process is simple and reliable. Acoustic specialists in the aeronautics and the building constructionfields have recognized the potential of the proposed product and a provisional patent has been filed. Thecompanies approached are welcoming this unexampled multifunctional technology with high potential forcommercialization, and are calling for further testing and improvements.The purpose of this project is to respond to industry requirements prior to industrialization by validating thetechnology in relevant environment. The objective is to prove that the manufacturing process parameters arefully controlled, and that these thermoset foams respect acoustic, physical and mechanical specifications fromindustry. The project will show the benefits of making these low-cost acoustic foams with flight certifiedthermosetting resins. The fabrication process will be optimized. Large samples will be manufactured. Differentresin systems and foam structures will be tested. Acoustic performance, mechanical properties andairworthiness will be assessed experimentally. Effectiveness of acoustic prediction tools will be verified.Integration in representative aerospace sandwich structure will be tested.This new technology will contribute to the economic health and growth of the 211 000 jobs and 28 G$Canadian aerospace industry. It is providing a means of limiting the "adverse community reaction related to theoperation and expansion of airports" deplored by the International Civil Aviation Organisation. Mitigation ofaircraft noise is among manufacturers and airport managers' top priorities and key environmental goals.