Resonant Column is a versatile system that combines Resonant Column and torsional shear tests into one convenient device for evaluating Shear Modulus and Damping Ratio. 

It includes:

A series of transducers with signal conditioning

Cell and back pressure electro-pneumatic control system

Current-driven motor that applies torsional load to the sample

Data logger.

Main Features

Robust design and long lasting: Sturdy construction minimizes losses and helps to deliver a consistent frequency response. The stainless steel base cell with acrylic transparent cylinder won’t rust or corrode, prolonging your equipment’s life.

User-friendly Graphic User Interface (GUI). The high quality laptop PC supplied with pre-installed intuitive Windows-based software allows you to perform various stages: saturation, isotropic consolidation, resonant frequency and torsional shear. The 7” color touchscreen with high resolution display makes cell, back and pore pressure easy to monitor.

Versatile: Resonant column and cyclic torsional shear devices are combined into a single device allowing you to determine the following:

RC: damping ratio from half power bandwidth, free vibration data and white noise

TSS: damping ratio from hysteresis loops

Compact and easy-to-install: the cell consists of an outer cell and inner cell, both supporting the magnetic drive simultaneously. Connecting the laptop supplied to the compact unit, the user can to access all controls, power supply as well as electrical and pneumatic devices.

Easy saturation: additional upper drainage is included ensuring proper sample saturation.

High resolution and accuracy: Proximity transducers are mounted on the automated positioning system which automatically places them in the best measuring position after saturation and consolidation, eliminating the need for any manual adjustments during the test.

Efficient and time-saving: The software uses the “Chirp Method” to continuously change the frequency applied to the sample. This method experiences no jumps when changing from one frequency to another improving strain measurement resolution and shortening testing time.

Technical Specifications:

Maximum angular deformation: 10°

Maximum torque: 1.5 Nm

Two electro-pneumatic converters for cell and back pressure

Excitation frequency: Dynamic (RC) 1-300 Hz; Cyclic (TS) from 0 to 50 Hz maximum

Maximum cell and back pressure: 1 MPa.

10 channels signal conditioning unit

USB data acquisition and signal generation board

Dimension: Control Box 51x45 x 35 cm (h x w x d); Cell 55 cm x 27 cm (h x diam.)

Weight: approx. 50 kg.