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

SIMLIGHT项目致力于对雷击对完全连接的飞机的影响进行计算电磁(CEM)模拟，以及对飞机结构、集成传感器和部件的设计、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。为新概念预测电磁环境并进行鉴定和批准投入使用的能力至关重要。根据严格的测试和国际标准，产品必须受到电磁干扰、雷击诱发效应和高强度辐射场的保护。CEM模拟对于预测电磁性能是必不可少的，但仍然存在重大挑战。前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。计算要求必须支持跨宽频谱和长模拟时间的模拟，并结合精细网格和大计算域。布线和电子设备的模拟必须解决子系统的复杂性增加及其对电磁干扰/兼容性的影响。需要为复合材料和合金开发和验证新的材料模型。SIMLIGHT的目标是向前迈进一步，引入新的工具和技术来解决这些挑战，并支持向基于模型的工程和CEM数字孪生的发展。新的前处理能力将被开发，包括：闪电附着区预测工具；强大的自动中表面生成器，用于将薄壁结构简化为壳体，以便更快地进行网格划分和模拟；用于在CAD中识别和处理关键EMC信息的工具；一种新的基于包络的复杂几何形状自动简化工具。电磁仿真工具将基于EMSCAT项目中开发的用于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和闪电效应能力。将开发新的参数化模型，用于小的几何特征，如细槽和孔，并与前处理能力相联系。电缆束建模将通过直接包含在时域解算器中以及通过与考虑单个电缆的完整传输线解决方案相耦合来解决。介电和导电薄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，结合高频到低频外推技术，将减少以必要分辨率进行整机模拟所需的过长计算。开发的工具和技术将受益于工业航空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。

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.