GB/T 28046.3-2011 Standard Interpretation
Road vehicles Environmental conditions and tests for electrical and
electronic equipment Part 3: Mechanical loads
1 Test scope:
This part applies to automotive electrical and electronic
systems/components.
2 Vehicle type:
According to the vehicle type, it is mainly divided into two
categories: passenger cars and commercial vehicles.
3 Vibration test:
It should be confirmed that the product belongs to the installation
position, see the table below:
Vehicle type
Installation position
Test conditions
Passenger car
Test I-Engine
Sine vibration test:
Sweep rate; ≤0.5oct/min;
Test time: 22h/direction;
Test direction: X/Y/Z, three directions;
Severity level: determined by the customer based on the number of
engine cylinders.
Random vibration test:
Test time: 22h/direction;
Test direction: X/Y/Z, three directions;
Total root mean square value RMS: 181m/s²
Test II-Transmission
Sine vibration test:
Sweep rate; ≤0.5oct/min ;
Test time: 22h/direction;
Test direction: X/Y/Z, three directions;
Random vibration test:
Test time: 22h/direction;
Test direction: X/Y/Z, three directions;
Total root mean square value RMS: 96.6m/s²
Test III-Flexible air chamber
Sine vibration test:
Sweep rate; ≤0.5oct/min;
Test time: 22h/direction;
Test direction: X/Y/Z, three directions
Test IV-Elastomer (car body)
Random vibration test:
Test time: 8h/direction;
Test direction: X/Y/Z, three directions;
Total root mean square value RMS: 27 .8m/s²
Test V-Non-elastic body (wheel/wheel suspension)
Sine vibration test:
Test time: 8h/direction;
Test direction: X/Y/Z, three directions;
Total root mean square value RMS: 107.3m/s²
Commercial vehicle
Test VI-Engine/transmission
Sine vibration test:
Sweep rate; ≤0.5oct/min;
Test time: 94h/direction;
Test direction: X/Y/Z, three directions;
Random vibration test:
Test time: 94h/direction;
Test direction: X/Y/Z, three directions;
Total root mean square value RMS: 177m/s²
Test VII- Elastomer
Random vibration test:
Test time: 32h/direction;
Test direction: X/Y/Z, three directions;
Total root mean square value RMS: 57.9m/s²
Test VIII-Split cab
Random vibration test:
Test time: 32h/direction;
Test direction: X/Y/Z, three directions;
Total root mean square value (vertical) RMS: 21.3m/s²
Total root mean square value (vertical) RMS: 11.8m/s²
Total root mean square value (vertical) RMS: 13.1m/s²
Test IX-Non-elastic body
Random vibration test:
According to test VII
For details of sinusoidal vibration, please refer to the standard
4 The above vibration can be carried out at room temperature. If
temperature cycle is applied, refer to the figure below:
Picture
Picture
5 See the table below for other test requirements:
Chapter
Test Item
Test Condition
Applicable Products
4.2.1
Mechanical Shock
(Select one of the conditions for the test)
Severity 1: 50g, 11ms, 13,000 times
Severity 2: 30g, 6ms, 100,000 times
Products on driver's door and cargo door
Severity 1: 50g, 11ms, 6,000 times
Severity 2: 30g, 6ms, 50,000 times
Products on passenger door
Severity 1: 50g, 11ms, 2,400 times
Severity 2: 30g, 6ms, 30,000 times
Products on box cover and baffle
Severity 1: 50g, 11ms, 720 times
Severity 2: 30g, 6ms, 3000 times
Products on the hood
4.2.2
50g, 6ms, 10 times/direction*6 directions
Regular products on the body
4.2.3
3000~50000m/s², <1ms, the number of times needs to be determined
Products in the transmission
4.3
Free fall
Number of DUTs: 3pcs
Each DUT falls 2 times
Drop height: 1 meter or agreed height
Each DUT falls in different axial directions, and the 2 drops are
in opposite directions
All products that may fall to the ground
4.4
Appearance strength
Specific conditions are agreed upon by both parties of supply and
demand
4.5
Sand and gravel impact
Specific conditions are agreed upon by both parties of supply and
demand
