Document ID: chunk:federal_register_of_legislation:F2025L00028:front:0:p25
Version: federal_register_of_legislation:F2025L00028
Segment Type: other
Provision Reference: 
Character Range: 71370–74324

= rib deflection

               The calculation algorithm to be used is set out in Annex 4, Appendix 2.

              3. Abdomen protection criterion

               The peak abdominal force is the maximum value of the sum of the three forces measured by transducers mounted 39 mm below the surface on the crash side, CFC 600 Hz.

              4. Pelvis performance criterion

               The pubic symphisis peak force (PSPF) is the maximum force measured by a load cell at the pubic symphysis of the pelvis, filtered at channel frequency class 600 Hz.

Annex 4 - Appendix 2
The procedure for calculating the viscous criterion for EUROSID 1
       The Viscous Criterion, VC, is calculated as the instantaneous product of the compression and the rate of deflection of the rib. Both are derived from the measurement of rib deflection. The rib deflection response is filtered once at Channel Frequency Class 180. The compression at time (t) is calculated as the deflection from this filtered signal expressed as the proportion of the half width of the EUROSID 1 chest, measured at the metal ribs (0.14 metres):

       The rib deflection velocity at time (t) is calculated from the filtered deflection as:

       where D(t) is the deflection at time (t) in metres and t is the time interval in seconds between the measurements of deflection. The maximum value of t shall be 1,25 x 10-4seconds.

       This calculation procedure is shown diagrammatically below:

Annex 5
Mobile deformable barrier characteristics
              1. Characteristics of the mobile deformable barrier

              1.1. The mobile deformable barrier (MDB) includes both an impactor and a trolley.

              1.2. The total mass shall be 950 ± 20 kg.

              1.3. The centre of gravity shall be situated in the longitudinal median vertical plane within 10 mm, 1,000 ± 30 mm behind the front axle and 500 ± 30 mm above the ground.

              1.4. The distance between the front face of the impactor and the centre of gravity of the barrier shall be 2,000 ± 30 mm.

              1.5. The ground clearance of the impactor shall be 300 ± 5 mm measured in static conditions from the lower edge of the lower front plate, before the impact.

              1.6. The front and rear track width of the trolley shall be 1,500 ± 10 mm.

              1.7. The wheelbase of the trolley shall be 3,000 ± 10 mm.

              2. Characteristics of the impactor

               The impactor consists of six single blocks of aluminium honeycomb, which have been processed in order to give a progressively increasing level of force with increasing deflection (see paragraph 2.1. below). Front and rear aluminium plates are attached to the aluminium honeycomb blocks.

              2.1. Honeycomb blocks

              2.1.1. Geometrical characteristics

              2.1.1.1. The impactor consists of six joined zones whose forms and positioning are shown in Figures