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摘要:
空间太阳能电池是航天能源系统的关键主件，其所受应变主要由太阳能基板通过黏接层传递，准确表征基板到电池的应变传递规律，可为空间太阳能电池的抗力学性能研究提供技术支撑。基于此，根据剪滞理论建立了空间太阳能电池的应变传递理论计算模型，从理论上分析了空间太阳能电池的应变传递规律，推导了均匀应变场和典型非均匀应变场下的结果，并利用ANSYS有限元模型和实物实验进行了验证，结果表明理论模型的正确性。同时，还具体分析了空间太阳能电池几何参数和物理参数对应变传递率的影响，为空间太阳能电池的设计提供了理论依据。
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关键词:
- 空间太阳能电池 /
- 应变传递 /
- 黏接层 /
- ANSYS有限元模型 /
- 剪滞理论
Abstract:Space solar cells are critical components of aerospace energy systems. The strain they experience is primarily transmitted from the solar array substrate through the adhesive layer. Accurately characterizing the strain transfer from the substrate to the cell is crucial for understanding the mechanical resistance performance of space solar cells. This paper establishes a theoretical model for strain transfer in space solar cells based on shear-lag theory. It provides data for both uniform and typical non-uniform strain fields and theoretically examines the strain transmission mechanism in space solar cells. The model’s validity was confirmed through ANSYS finite element analysis and physical experiments, demonstrating the correctness of the theoretical model. The study also investigates how the physical and geometric characteristics of space solar cells impact the strain transfer rate, offering a theoretical basis for their design.
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Key words:
- space solar cells /
- strain transfer /
- adhesive layer /
- ANSYS finite element model /
- shear lag theory
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图 2 黏贴在基板上的空间太阳能电池应力传递图
Figure 2. Stress transmission diagram of space solar cells attached to the substrate
图 3 在基板均匀应变场下的空间太阳能电池
Figure 3. Space solar cells under uniform strain field on the substrate
图 4 黏贴在基板上的空间太阳能电池三维有限元模型
Figure 4. Three-dimensional finite element model of space solar cells attached to the substrate
图 5 均匀应变条件下基板、电池层和玻璃盖片沿轴向的应变分布
Figure 5. Axial strain distribution of the substrate, battery layer, and glass cover under uniform strain condition
图 6 三点弯条件下黏贴在基板上的空间太阳能电池
Figure 6. Space solar cells attached to the substrate under three-point bending conditions
图 7 三点弯条件下黏贴在基板上的空间太阳能电池有限元模型
Figure 7. Finite element model of space solar cells attached to the substrate under three-point bending conditions
图 8 黏贴在铝基板上的空间太阳电池三点弯曲试验示意图
Figure 8. Schematic diagram of three-point bending test of space solar cells attached to aluminum substrate
图 9 三点弯条件下空间太阳电池玻璃盖片和电池层沿轴向应变的理论解、仿真解和实验测量值
Figure 9. Theoretical solutions, simulation results, and experimental measurements of the axial strain in the glass cover and battery layer of a space solar cell under three-point bending conditions
图 10 空间太阳能电池长度及电池层厚度对应变传递率的影响
Figure 10. The impact of the length of space solar cells and the thickness of the battery layer on the strain transfer rate
图 11 底片胶剪切模量及厚度对应变传递率的影响
Figure 11. The effect of the shear modulus and thickness of the adhesive film on the strain transfer rate
表 1 基板和空间太阳能电池的尺寸和力学性能参数
Table 1. Dimensions and mechanical performance parameters of substrate and space solar cells
材料 弹性模量/MPa 泊松比 长度/mm 厚度/mm 基板 71 0.33 3000 8 底片胶 0.002 0.47 120 0.1 电池层 120 0.26 120 0.145 盖片胶 0.00025 0.49 120 0.04 玻璃盖片 75.56 0.209 120 0.12 
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