SVH

The SVH project is part of a series of experimental studies conducted using Ifsttar’s geotechnical centrifuge in marine geotechnics, ranging from studies of foundations for offshore platforms to foundations for offshore energy production structures.

The planned servo-cylinder is similar to its two predecessors at Ifsttar (50×220mm² cross-section, 3200daN capacity), but with a longer stroke: 450mm (compared to 70 and 300mm respectively today).

In addition to the stroke, the expected performance is speeds between 0.002 and 130 mm/s and the ability to perform cyclic loads typically of ±1 mm at 20 Hz.

Experiments on small-scale centrifuge models make it relatively easy (and therefore very inexpensive compared to in situ testing) to conduct parametric studies on the behavior of foundations, for example under cyclic loading.

Furthermore, studies conducted using this device should enable the foundations of high-power wind turbines to be dimensioned as accurately as possible according to site conditions, thereby reducing their long-term cost.

It is a piece of equipment in itself that does not require an intermediate demonstrator phase. The shorter-stroke actuators already used in centrifuges have already proven their robustness in macro-gravity conditions.

This new equipment is quite versatile and can be used on various projects involving the foundations of offshore energy production structures. It complements a whole range of equipment developed around the geotechnical centrifuge since 1985.

Thanks to this device, it will undoubtedly be easier to explore the behavior of piles under cyclic loads (creation of stability diagrams).