1. MOVE2 Solar Panel Analysis

2. Model
Material: CFRP
Properties: E_x=132525MPa, E_y=8440MPa, G_xy=4700MPa, G_yz=3150MPa, G_xz=4700MPa, rho=1.5e-9t/mm^3
Solar Cells: GaAs, E=1MPa (negligible), rho=5.31e-9t/mm^3
Measurements: l_panel=210mm, h_panel=80mm, t_CFRP=0.2, t_solarcell=0.2
Hinges 5mm at x=50mm and x=160mm
Mechanism 5mm in middle of panel side
Layup: solar cell over entire panel, 7 CFRP layers, 0,45,-45,0,45,-45,0
Simulation in ANSYS 12.1

3. Mesh and Boundary Conditions

4. Layup Plot

5. 20g static load, z Deformation

6. Modal Analysis
Modular frequencies: All frequencies are well above the range of harmonic oscillations on Dnepr (which are at 2-20Hz)
SET TIME/FREQ

7. Modal Analysis-Modular Forms

8. Comparison: 4 layer, 1mm CFRP under 20g static load

9. Preliminary random vibration analysis
Power spectral density according to Dnepr user manual
Calculation according to
Problem: Damping factor is unknown -> testing and iteration necessary (can be done in cooperation with LLB)
Most important result: Panel corner deformation should stay below 0.746mm for 99.7% of the time (3 sigma)

10. 3 sigma displacement plot

11. PSD response diagram

12. Conclusion
Use of a single Hold-down/release mechanism seems viable for a panel thickness of ~1.5mm
A 1mm panel will likely be too thin
Shock analysis will be done in ANSYS at LLB at a later date (not critical for REXUS)