Project Setu：面向0.20c相对论光帆的3D多物理场设计与空间飞行验证框架
Project Setu: 3D Multi-Physics Design and Scaled Structural Analysis for a Relativistic Lightsail Architecture
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中文总结 AI 辅助
提出Project Setu框架，通过3D多物理场耦合仿真设计4米光帆，实现0.20c相对论速度，并经飞行数据验证推力模型，确保结构安全与热稳定性。
中文摘要 AI 辅助
太阳系外的深空探测需要消除化学推进剂的质量惩罚，以实现相对论飞行速度（180秒时达到0.166c，227秒时达到任务目标0.20c）。本研究提出了一个由100 GW地面激光阵列驱动的4.0米圆形光帆的3D多物理场数值框架，该框架在ANSYS Mechanical APDL和Ansys Lumerical中耦合了3D Maxwell FDTD波动光学、非线性膜力学和Stefan-Boltzmann热辐射。四级网格收敛研究确立了数值独立性，ASME GCI_21为0.13%，解析出530.88 MPa的峰值膜应力，相对于化学计量Si3N4拉伸破坏具有3.77倍安全系数。在光学吸收限制为10 ppm（A = 1.0 x 10^-5）的条件下，稳态核心温度稳定在923.02 K（与辐射理论偏差0.44%），保持高于升华温度1,247 K的裕度，而基本鼓膜模态共振（7.92 Hz）为激光抖动提供了7.92倍安全缓冲。光子推力公式与JAXA IKAROS和NASA LightSail 2的飞行遥测数据分别匹配在0.12%和2.13%以内，验证了太阳推进和光束推进两种模式下动量传递的一致性。
英文摘要
Deep-space exploration beyond the solar system requires eliminating chemical propellant mass penalties to achieve relativistic flight velocities (0.166c at 180 s, reaching the mission target of 0.20c at 227 s). This study presents a 3D multi-physics numerical framework for a 4.0-meter circular lightsail propelled by a 100 GW ground laser array, coupling 3D Maxwell FDTD wave optics, non-linear membrane mechanics, and Stefan-Boltzmann thermal radiation in ANSYS Mechanical APDL and Ansys Lumerical. A four-level grid convergence study establishes numerical independence with an ASME GCI_21 of 0.13%, resolving peak membrane stresses of 530.88 MPa with a 3.77x safety factor against stoichiometric Si3N4 tensile failure. With optical absorption constrained to 10 ppm (A = 1.0 x 10^-5), the steady-state core temperature stabilizes at 923.02 K (0.44% deviation from radiation theory), maintaining a +1,247 K margin below sublimation, while fundamental drumhead modal resonance (7.92 Hz) provides a 7.92x safety buffer against laser jitter. The electrodynamic radiation pressure formulation is cross-verified against published flight telemetry from JAXA IKAROS and NASA LightSail 2 within 0.12% and 2.13%, confirming classical momentum transfer modeling across solar and beamed propulsion regimes.
发表机构
- AeroMyne
- Project Setu Initiative
机构由 AI 辅助整理，请以论文原文为准。
