TB/T 2218-2021 in English
VALIDMinimum radius curve negotiation calculation and test of rolling stock
- Issued on:2021-09-07
- Implemented on:2022-04-01
- File Format:PDF
- Delivery:Via email within 5 business days
$350.00
Introduction
Background of Standard Revision and Technological Evolution
This standard integrates the relevant contents of TB/T 2218-2010 and TB/T 1335-1996. The main technical upgrades include:
- Expanding the scope of application to all types of EMUs, locomotives and freight cars
- Adding hump curve passability calculation requirements
- Refining the measurement method of coupler deflection angle
Core calculation requirements
Geometric passability verification
| Curve type | Calculation formula | Judgment index |
|---|---|---|
| Circular curve | γ=180°-α-β | γ≤structural limit value |
| Curved and straight line transition | γ₁=180°-α₁-β₁ | γ₁≤structural limit value |
| Reverse curve | γ₂=180°-α₂-β₂ | γ₂≤structural limit value |
Hump line uplift calculation
When all axles of the locomotive are located in the vertical curve:
h=R_v-√(R_v²-(L/2)²)
When the locomotive axle crosses the ramp and the flat road:
h=(L/2)×tan[arctan(i)×(S/2R_v)]
Key points for test implementation
Test line configuration
- Circular curve radius: minimum value for single-vehicle maneuvering
- Reverse curve: straight section ≤10m
- Hump slope: in accordance with TB 10062-2018 requirements
Key test items
- No. 15 coupler deflection status inspection
- Visual inspection of windshield misalignment
- Verification of vehicle-end electrical connection line length
- EMU curve coupling function test
Implementation suggestions
Design stage
It is recommended to use 3D dynamic simulation to pre-verify geometric passability, focusing on:
- Minimum clearance between bogie and car body ≥50mm
- Reserve 10% safety margin for coupler deflection angle
Test phase
It is recommended to use laser displacement sensor (accuracy 0.1mm) to measure coupler deflection, and the test speed is controlled at 5±0.5km/h.
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