Standards Development

Scope

This document:

- defines the forces and moments to be taken into account with reference to masses, traction and braking conditions;

- gives the stress calculation method for axles with inboard axle journals;

- specifies the maximum permissible stresses to be assumed in calculations for steel grade EA1N, EA1T and EA4T defined in EN 13261;

- describes the method for determination of the maximum permissible stresses for other steel grades;

- determines the diameters for the various sections of the axle and recommends the preferred shapes and transitions to ensure adequate service performance.

This document is applicable for:

— axles defined in EN 13261

— powered and non-powered axles and

— all track gauges.

The powered axle design method of this document applies to:

— solid and hollow powered axles for railway rolling stock;

— solid and hollow non-powered axles of motor bogies;

— solid and hollow non-powered axles of locomotives.

The non-powered axle design method of this standard applies to solid and hollow axles of railway rolling stock used for the transportation of passengers and freight that are not considered in the list above.

This document is applicable to axles fitted to rolling stock intended to run under normal European conditions. Before using this document, if there is any doubt as to whether the railway operating conditions are normal, it is necessary to determine whether an additional design factor has to be applied to the maximum permissible stresses. The calculation of wheelset axles for special applications (e.g. tamping/lining/levelling machines) may be made according to this document only for the load cases of free-rolling and rolling in train formation.

This document does not apply to the loads induced by the vehicles in their working mode. They are calculated separately. This method can be used for light rail and tramway applications

Purpose

Change Scope to be consistent with the EN 13103-1.

- The European foreword has to be adapted from the EN 13103-1 to be consistent.

- The Introduction is missing. Add Introduction to be consistent with the EN 13103-1

- If necessary change with issue dates of the mentioned standards. And consider the CEN standardisation rules.

- In chapter “3 Terms and definitions” The definitions of the EN 13103-1 have to be adapted. This for chapter 3.1.

- The table 2 from the amendment A1: 2020 from the EN 13103-1 has to be adapted. Therefore add in the last row “2” above the second column: Design mass in working order + 1.2 × Normal design payload. And add a line between second (1) and third row (2) Add also above 2 – Passenger vehicles... the following: Coaches and traction units including accommodation for passengers, luggage or post. To be consistent with the EN 13103-1.

-The title of table 3 has to be changed to: Table 3

– Formulae for calculation of forces, to be consistent with the EN 13103-1.

- Chapter 6.2, table 3: wrong formula for Q1: Delete “yi” after Fi in the calculation formula for the moment due to Fi.

- Chapter 6.3 table 5 page 17: wrong formulas of M’x and M’z Change to: M’x = Ff * Γ * [(y+yi) – (b+s+yi) / 2b * (y-s+b)]; M’z = Ff * Γ * Rb/2R * y und M’z = Ff * Γ * Rb/2R * (s-b).

- Chapter 6.3; Table 5: Wrong moment outline for Mx’ has to be corrected.

- Chapter 6.3 Effect due to braking, To be consistent with the EN 13103-1 use the proposed change as a note: Note: If other methods of braking are used, the forces and moments to be taken into account can be obtained on the basis of the same principles as those shown in Table 5. Special attention should be paid to the calculation of the Mx ‘ component which is to be added directly to the Mx ‘ component representing masses in motion.

- Chapter 6.6; Note at page 19 has to be corrected into: NOTE At a point on the outer surface of a solid cylinder (also in the case of a hollow one) with d as diameter. - other issues that might occur.