Vibration simulation analysis

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Analysis purposes

1.By vibration simulation analysis, we can get the stress and the highest of stress speed of each part.
2.Then, unified computing with the fatigue life of the material, we can judge if the chosen material is qualified to the resistance requirements.
Analytical conditions Material Parameters
Vibration Frequency(Z) Power Density Spectrum
10 0.208
55 0.0677
180 0.0026
300 0.0026
360 0.00146
1000 0.00146
No Part Name Material Density Elasticity Modulus Tensile Strength Poisson's ratio
1 Lens PC 1200 2400 67 0.3
2 Reflector PC 1200 2400 67 0.3
3 Housing PP+TD20% 1040 1800 20 0.3

Modal Analysis

Analysis Result

Part Stress(MPa) Allow cycle number Actual cycle number Damage Total damage
Lens 1σ(0.74) 1.64E24 5.32E7 3.24E-17 7.14E-13
2σ(1.48) 5.69E20 5.24E7 9.21E-14
3σ(2.22) 5.39E18 3.35E6 6.22E-13
Housing 1σ(0.62) 1.15E19 1.25E8 1.08E-11 2.09E-07
2σ(1.24) 4.01E15 5.05E7 1.25E-08
3σ(1.86) 3.79E13 7.93E6 2.08E-07
Reflector 1σ(1.84) 4.66E19 4.86E7 1.04E-12 2.13E-08
2σ(3.68) 1.61E16 2.11E6 1.30E-09
3σ(5.52) 1.52E14 3.06E6 1.99E-08

The total damage of reflector , housing , lens is less than 1, so the fatigue damage will not happen