Sonelastic
®
Systems
SA-BC Adjustable support for bars and cylinders
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7.2 Placing the specimen
The specimen should be symmetrically placed over the support-cables, with those at a
distance of 0.224 L from the specimen ends (L is the specimen length). For instance, if a
specimen
’s length
(L) is 100 mm, the support-cables should be positioned at a distance of
22.4 mm from the ends. The positions of 0.224 L correspond to the nodal lines of the flexural
vibration mode.
Typical positioning for a cylinder.
Typical positioning for a rectangular bar.
The corresponding distance calculation of 0.224 L is automatically generated and informed by
Sonelastic
®
Software. The specimen marking may be done by using a pencil and a ruler or a
caliper ruler. The Support-cables position is adjusted by dislocating the anchoring terminals.
8. Support installation
8.1 Requirements
- A flat and leveled workbench with a free space of at least 60 x 120 cm (depth and width).
This space is enough to fit SA-BC Support, specimens, computer and optional items.
- A 127 or 220 VAC three-pin ground wired electrical mains plug. This plug is needed to power
the computer up.
The support installation consists of positioning it over the workbench and coupling the acoustic
sensor to the vertical base or Sturdy Tripod. Following that, choose the support-cables and
install them.
