BS EN 15686:2010 pdf download.Railway applications – Testing for the acceptance of running characteristics of railway vehicles with cant deficiency compensation system and/or vehicles intended to operate with higher cant deficiency than stated in EN 14363:2005, Annex G.
BS EN 15686 specifies the on-track testing for acceptance of the running characteristics of railway vehicles equipped with a cant deficiency compensation system and/or vehicles intended to operate with a higher cant deficiency than stated in EN 14363:2005. Annex G.
In most cases the procedure is the same as defined in EN 14363, only the differences for the special case are listed.
The testing of the running characteristics applies principally to all vehicles used in public transport which operate without restriction on standard gauge tracks (1 435 mm).
NOTE I The testing of the running characteristics of:
— railways with different track layout,
— railways with non-standard gauge tracks
can be conducted by analogy with this European Standard,
The testing of running characteristics is part of the test for the acceptance of running characteristics of
vehicles which:
are newly developed,
— have had relevant design modifications, or have changes in their operating regimes.
The testing and acceptance of running characteristics refers to the complete vehicle including the running gear. If a running gear, which has already been tested and accepted, is to be used under a vehicle body of another design, this is considered to be a design modification. The procedure as described in 5.2 is used.
NOTE 2 In addition to the testing of running characteristics for the acceptance of vehicles, the regulations can be generally applied in other technical tasks. e.g.:
— the checking for compliance against development contracts;
— the optimization of components, vehicles or running gear;
— the testing of influences, influencing parameters and relationships of dependence;
— the monitoring of track or vehicles in operational use.
The application of the full method and the stated limit values reflects unrestricted international operation.
Testing for acceptance of vehicles is based on some reference conditions of track. If these are not respected on certain lines, appropriate measures will be taken (speed modifications, additional tests, etc.).
For national or multinational operations, variations may be authorized from the defined conditions. Permissible deviations are indicated in this European Standard.
It is allowed to deviate from the rules laid down if evidence can be furnished that safety is at least the equivalent to that ensured by complying with these rules.
2 Normative references
The following referenced document is indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 14363:2005, Railway applications — Testing for the acceptance of running characteristics of railway vehicles — Testing of running behaviour and stationary tests
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 14363:2005 apply.
4 Stationary tests
For stationary tests the requirements of EN 14363 shall apply.
5 On-track tests
5.1 General
When planning on-track tests the operational limiting parameters and cd for the vehicle have to be selected. The chosen values determine the future use of the vehicle.
It can be necessary to test a vehicle for more than one combination of i and cd,, as shown in Figure 1. Point A, point B and point C are related to the different test conditions.
The homologated operation conditions shall be documented in the test report.
For the acceptance of a vehicle within the scope of this European Standard the following modification of the
procedure defined in EN 14363 shall be respected:
for speeds of at least 200 kmffi and non-conventional cant deficiencies an additional test zone with curve radii between 600 m and 900 m shall be included1
— for the assessment of the running safety the overturning value q is used as additional parameter. A special assessment method for the estimated maximum value of this parameter is defined;
— the simplified measuring methods are only applicable for extensions of acceptance without extension of cant deficiency:
— for the transition curves the results shall be presented depending on three types of transition curves. The symbols of quantities and characteristics used in Clause 5 are defined in Annex F of EN 14363:2005.
5.2 Type of on-track test and measuring method
5.2.1 Choke of on-track test type
In principle the same procedure as defined in EN 14363:2005, 5.2.1 shall be applied,
For the extension of an acceptance state, Annex A gives the conditions for dispensation or application of partial on-track tests. They are depending on the test methods of the initial and the new acceptance as well as on the results achieved during the initial acceptance and the modifications of relevant parameters.
NOTE The conditions for the choice of on-track test type for an extension of an acceptance state are slightly different from EN 14363. They are based on the process described in UIC 518:2009. WG 10 intends to modify EN 14363 accordingly during its revision.
5.2.2 Choice of measuring method
In principle the same procedure as defined in EN 14363:2005. 5.2.2 shall be applied.
For the extension of an acceptance state, Annex A gives the conditions by the use of one of the simplified measuring methods including the indication of required axle box force measurement. They are depending on the test methods of the initial and the new acceptance as well as on the results achieved during the initial acceptance and the modifications of relevant parameters.BS EN 15686 pdf download.