BS EN 13749:2021 pdf download.Railway applications Wheelsets and bogies Method of specifying the structural requirements of bogie frames.
BS EN 13749 specifies the method to be followed to achieve a satisfactory design of bogie frames and includes design procedures, assessment methods, verification and manufacturing quality requirements. It is limited to the structural requirements of bogie frames including bolsters and axiebox housings. For the purpose of this document, these terms are taken to include all functional attachments, e.g. damper brackets.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, oniy the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 15085-1:200 7+A 1:2013, Railway applications – Welding of railway vehicles and components – Part 1:
General
EN 15085-2:2007, Railway applications – Welding of railway vehicles and components – Part 2: Quality requirements and certification of welding manufacturer
static force
force which is constant with time
Note 1 to entry: Force due to gravity is an example of static force.
3.5
quasi-static force
force, which changes with time at a rate which does not cause dynamic excitation
Note 1 to entry: Quasi-static force might remain constant for limited periods.
3.6
dynamic force
transient, impulsive or continuous force, uniform or random, that changes with time at a rate that causes dynamic excitation
4.2 General requirements
The technical specification shall indicate the type of bogie required in terms of its use. It shall also indicate the intended life of the bogie, its average annual distance run and its total distance run and all the information that is applicable to a bogie frame associated with the Essential Requirements of a TSI as indicated in EN 15827:2011. Information that is particularly relevant to bogie frame design is indicated in the following clauses.
4.3 Design load cases
The technical specification for the bogie frame shall consist primarily of the load cases required for the design of the bogie as specified in EN 15827:2011, plus any additional load cases required by that standard or arising from the application. The load cases shall be based on the vehicle mass states given in EN 15663:2017+A1:2018. However, for some applications and fatigue assessment methods it will be necessary to use additional vehicle loading conditions (expressed as functions of the cases in EN 15663:2017+A1:2018) to obtain an accurate description of the vehicle payload spectrum for design purposes.
The development of the design load cases is discussed in Annex B and examples of design load cases associated with bogie running and due to the attachment of equipment are given in Annexes C and D.BS-EN-13749-2021