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Operating Deflection Shapes (ODS) Analysis

Nuclear power plant after sunset. Dusk landscape with big chimneys.

Mobility Testing

In mobility testing, accelerance, mobility and compliance functions are calculated. For structures with well-separated modes, estimation of natural frequencies and damping ratios is possible. Often done during troubleshooting using hammer testing.

rail illustration outline

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

rail illustration outline

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

Operating Deflection

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

Mobility Testing

Mobility Testing

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

rail illustration outline

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

rail illustration outline

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

rail illustration outline

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

rail illustration outline

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

Operating Deflection

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

rail illustration outline

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

mechanic checking the motor of a car

Operating Deflection Shapes (ODS) Analysis

A versatile application for determining the vibration patterns of machinery and structures under various operating conditions such as engine speed and ambient forces. Our ODS systems guide you through the entire measurement and analysis process.

engineer with glasses working on the computer with two screens showing the durability simulation and analysis software tools

Mobility Testing

In mobility testing, accelerance, mobility and compliance functions are calculated. For structures with well-separated modes, estimation of natural frequencies and damping ratios is possible. Often done during troubleshooting using hammer testing.

Spanish university develops tests with HBM equipment for externally reinforced concrete beams

The structural research team at the Universitat Politècnica de Catalunya (UPC), Barcelona, Spain, has developed tests to determine the stresses in concrete beams that are used in construction. The tests, that have taken the past two years to develop, focus on the use of externally reinforced carbon fiber laminate to reinforce the concrete beams. The use of carbon fiber laminates (CFRP) has increased over the past several years. CFRP characteristically has its fibers running in one direction to provide a semi-rigid structure with high modulus when bonded with an epoxy adhesive. The laboratory tests were undertaken to simulate various types of failures that can commonly occur. These include:

Removal of a concrete roof
Removal of the end laminate interfacial
Detachment of the laminate interfacial induced by the fracture
Shear failure in concrete

UPC: Tests for externally reinforced concrete beams

Tests with 24 strain gages

The tests undertaken by the Laboratori per a la Innovació Tecnològica d'Estructures i Materials (LITEM) involved fitting the beams with 24strain gages of type 1-LY41-6/350. These were pasted in position using HBM adhesive X280. Strain gages were placed under the beam and along the CFRP strips with two at each side on position L/4 for linear displacement. In addition two laser sensors were placed – one on either side at the center of the beam – for triangulation displacement measurements.

Signal capturing with MGCplus

The signals were captured using HBM’s MGCplus with three AP815i modules for the strain gages while an AP801 module was used for the laser sensors. Load and displacement signals were detected by a 250 kN actuator. HBM’s catman®APdata acquisition software was used to analyze the results. Traditional beam theory was used to calculate the reinforced beam bending forces and these were subsequently compared with the data obtained from the tests. This enabled the general equation for doubly-reinforced concrete beams and beams reinforced with external laminates such as fiber-reinforced polymers to be modified to give more accurate estimations for deformationεdb (deformation blast-off). Future tests may also utilize gages attached to the laminated embedded on the tension face of beams.

The Customer

BarcelonaTech University

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