Document ID: chunk:federal_register_of_legislation:F2012C00535:front:0:p32
Version: federal_register_of_legislation:F2012C00535
Segment Type: other
Provision Reference: 
Character Range: 87511–90563

appendix 1 of this annex. The manufacturer may use either the static, or the dynamic characteristics of the PZ's and PH's for the calculation but shall not mix static and dynamic characteristics in one calculation.

Figure A8. 1 - Geometrical parameters of plastic hinges on a bay

       1.3. A statement of the total energy (ET) to be absorbed by the superstructure, using the formula stated in paragraph 3.1. below.

       1.4. A brief technical description of the algorithm and computer program which are used for the calculation.

       2. Requirements for the quasi-static calculation

       2.1. For the calculation, the complete superstructure shall be mathematically modelled as a load-bearing and deformable structure, taking account of the following:

       2.1.1. the superstructure shall be modelled as a single loaded unit containing deformable PZ's and PH's, connected by appropriate structural elements.

       2.1.2. the superstructure shall have the actual dimensions of the bodywork.  The inner contour of the side-wall pillars and roof structure shall be used when checking the residual space.

       2.1.3. the PH's shall utilise the actual dimensions of the pillars and structural elements on which they are located (see Appendix 1 of this annex).

       2.2. The applied loads in the calculation shall meet the following requirements:

       2.2.1. the active load shall be applied in the transverse plane containing the centre of gravity of the superstructure (vehicle) which is perpendicular to the vertical longitudinal centre plane (VLCP) of the vehicle.  The active load shall be applied on the cantrail of the superstructure through an absolutely rigid load application plane, which extends in both directions beyond the cantrail and any adjacent structure.
       2.2.2. At the beginning of the simulation the load application plane shall touch the cantrail at its most distant part from the vertical longitudinal central plane.  The contact points between the load application plane and the superstructure shall be defined to ensure an exact load transfer.

       2.2.3. the active load shall have an inclination  related to the vertical longitudinal centre plane of  the vehicle (see figureA.8.2).

            where:

             Hc  =  the cantrail height (in  mm) of the vehicle measured from the horizontal plane on
                       which it is standing.

       The direction of action of the active load shall not be changed during the calculation.

       2.2.4. the active load shall be increased by small incremental steps and the whole structural deformation shall be calculated at every loading step.  The number of loading steps shall exceed 100 and the steps shall be quasi-equal.

       2.2.5. during the deformation process the load application plane may, in addition to parallel translation, be allowed to  rotate around the axis of intersection of the load application plane with the transverse  plane containing the centre of gravity, in order to follow the asymmetric deformation