Temperature
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Operating temperature
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-40℃ ~ +60℃
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Storage temperature
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-40℃ ~ +70℃
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Humid heat
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Relative humidity
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95% ± 3%
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Temperature
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+25°C±2°C
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Storage time
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72h
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Vibration
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Vibration spectrum shape (grms=6.06)
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20Hz to 80Hz
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+3dB/oct
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80Hz to 350Hz
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G2/0.04 Hz
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350Hz to 2000Hz
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-3dB/oct
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Vibration direction and time
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vibrate in two direction for at least 10min
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Control point
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should be selected in the fixture or shaking table surface near the maximum stiffness of the product, large equipment can use multi-point average control
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Monitoring point
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the monitoring point should be selected in the key part of the product under test, so that the root mean square acceleration response does not exceed the maximum allowable design (grms=6.06)
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Installation requirements
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The specimen is firmly attached to the shaking table, and for products equipped with shock absorbers, the shock absorbers should be removed before testing
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Performance check
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During vibration testing with the equipment powered on, all performance indicators must meet the technical requirements specified in the design document. In the event of a failure, repairs are allowed. After the repair, the spectral value should be reduced to 0.01g²/Hz, grms=3.03, and the specimen should be subjected to vibration in the direction most susceptible to vibration for 10 minutes during the acceptance test.
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Temperature cycle
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Temperature range
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Power-on test
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-35±3℃ ~ +52±2℃
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Rate of temperature change
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Temperature rise
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10℃/min
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Cooling
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10℃/min
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Cycle times
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Ten cycles should be completed, ensuring that the last 2 cycles are without faults. If a fault occurs during the last 2 cycles, after repairs, an additional 2 fault-free cycles are required.
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Cycle time
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One cycle time is 4h, one cycle includes temperature rise → temperature stay → cooling → temperature stay → temperature rise
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High and low temperature residence time
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the residence time depends on the heat capacity of the specimen. Based on the principle of product thermal or cold permeability, the internal temperature of the specimen is maintained for 5min after reaching stability
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The requirements of the product under test
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general temperature cycle test with the whole machine, should be as far as possible to open the cover
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Check and repair
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In the power test equipment, after each temperature cycle test, it is necessary to confirm that the equipment is free of faults before proceeding to the next temperature cycle
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Drenching requirements
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Drenching is carried out with the whole equipment
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transportation requirements
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Equipment needs to be transported as a whole vehicle
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If the product has not undergone a road transport test, you can perform an indoor transport simulation test using a simulation transport table. This test involves conducting a sinusoidal cyclic vibration test to assess the product's performance
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The requirements of the simulated transport table test are as follows
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Test conditions
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Frequency
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5Hz ~ 200Hz
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Amplitude
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5Hz ~ 7Hz
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Amplitude 12mm ~ 8mm
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7Hz ~ 200Hz equal acceleration 1.5g
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Vibration test condition allowable deviation is the same as broadband random vibration test
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Direction
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vertical axle direction and side;Orientation: vertical and lateral to the axle
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Cycle time
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log-scan 5Hz ~ 200Hz ~ 5Hz, 12min per cycle;When the resonant frequency of the specimen is measured below 5Hz, the test frequency can be extended to 2Hz, 2Hz ~ 200Hz ~ 2Hz scanning, scanning time should be 15min.The vibration time in each direction is 90min
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After the transportation test, check for any signs of damage or structural loosening, and conduct an inspection of technical indices to ensure they meet the design requirements
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