SIMLIGHT - Simulation of Electromagnetic Effects of Lightning Strike for the Connected Aircraft

SIMLIGHT - 联网飞机雷击电磁效应仿真

• 批准号: 75365
• 金额: $ 22.22万
• 依托单位: INTERNATIONAL TECHNEGROUP LIMITED
• 依托单位国家: 英国
• 项目类别: BEIS-Funded Programmes
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=75365
• 关键词: SIMLIGHT; Simulation; Electromagnetic; Effects; Lightning

The SIMLIGHT project is concerned with the computational electromagnetic (CEM) simulation of the effects of lightning strikes on the fully connected aircraft, and the impact on the design, performance, compatibility, compliance and certification of aircraft structures, integrated sensors and components.Modern aircraft contain an ever-increasing array of complex electronic systems. The ability to predict electromagnetic environments for new concepts and undertake qualification and clearance into service is critical. Products must be protected against electromagnetic interference, induced effects of lightning strikes, and high intensity radiated fields following rigorous testing and international standards.CEM simulation is essential for predicting electromagnetic performance, but significant challenges remain. Pre-processing tools must effectively handle complex multi-scale aircraft geometry, including cabling and electronic equipment. Computational requirements must support simulation across a broad frequency spectrum and long simulation time, combined with fine mesh and large computational domains. Simulation of cabling and electronic devices must address increased complexity of subsystems and their impact on electromagnetic interference/compatibility. New material models need to be developed and validated for composites and alloys.SIMLIGHT aims to make a step forward, introducing new tools and techniques to address these challenges and support the move towards Model Based Engineering and the generation of a CEM Digital Twin.New pre-processing capabilities will be developed including: a lightning attachment zone prediction tool; a robust automatic mid-surface generator to reduce thin-walled structures to shells for faster meshing and simulation; tools for the identification and treatment of critical EMC information in CAD; a new shrink-wrap-based auto simplification tool for complex geometries.The electromagnetic simulation tool will be based on the novel time-domain hybrid solver for integrated antennas and sensors developed in the EMSCAT project, with new development focusing on capabilities for EMC and lightning effects.New parameterised models for small geometrical features such as thin slots and apertures will be developed and linked with pre-processing capabilities. Cable bundle modelling will be addressed by direct inclusion in the time-domain solver as well as by coupling with a full transmission line solution accounting for individual cables. New models for dielectric and conductive sheets will consider field diffusion through composites. Improved parallelisation schemes, combined with high- to low-frequency extrapolation techniques, will mitigate the exceedingly long computations required for whole aircraft simulation at the necessary resolution.The tools and techniques developed will benefit from the expertise of the industrial aerospace partner, ensuring a focus on key requirements and validation within an industrial environment.

SIMLIGHT项目关注雷击对全连接飞机的影响的计算电磁（CEM）仿真，以及对飞机结构、集成传感器和组件的设计、性能、兼容性、合规性和认证的影响。现代飞机包含越来越多的复杂电子系统。预测新概念的电磁环境并进行鉴定和批准投入使用的能力至关重要。产品必须按照严格的测试和国际标准进行电磁干扰、雷击感应效应和高强度辐射场的防护。CEM仿真对于预测电磁性能至关重要，但仍存在重大挑战。预处理工具必须有效地处理复杂的多尺度飞机几何形状，包括布线和电子设备。计算要求必须支持宽频谱和长仿真时间的仿真，并结合细网格和大计算域。布线和电子设备的仿真必须解决子系统日益复杂的问题及其对电磁干扰/兼容性的影响。SIMLIGHT的目标是向前迈进一步，引入新的工具和技术来应对这些挑战，并支持向基于模型的工程和CEM数字孪生模型的转变。将开发新的预处理功能，包括：闪电附着区预测工具;一个强大的自动中间表面生成器，用于将薄壁结构简化为壳体，以加快网格划分和仿真速度;用于识别和处理CAD中关键EMC信息的工具;一种新的基于收缩包装的复杂几何形状自动简化工具。电磁仿真工具将基于EMSCAT项目中开发的集成天线和传感器的新型时域混合求解器，新的开发重点是EMC和雷电效应的能力。将开发用于小几何特征（如细槽和小孔）的新参数化模型，并将其与预处理能力相关联。电缆束建模将通过直接包含在时域求解器中以及通过与考虑单个电缆的完整传输线解决方案耦合来解决。电介质和导电片的新模型将考虑通过复合材料的场扩散。改进的并行化方案，结合高频到低频的外推技术，将减轻在必要的分辨率下进行全机仿真所需的超长计算。开发的工具和技术将受益于工业航空航天合作伙伴的专业知识，确保专注于工业环境中的关键要求和验证。