References

Receiver isolation by vibration-insulated installation of a high-precision portal milling machine with a total mass incl. reinforced concrete foundation of approx. 650 t. Protection of the milling machine against vibrations from the adjacent press shop to ensure machining accuracy of the milling machine. Limitation of horizontal movements by horizontal buffer.

Delivery and installation of 20 VICODA spring elements with max. load capacity of 370 kN and 4 horizontal buffers. Vertical tuning frequency of the setup of approx. 2.9 Hz and damping factor of > 20%.

Limitation of vibration amplitudes and ground forces by vibration-isolated installation of a centrifugal fan with a weight of approx. 13t. In previous elastic installation, large horizontal movements occurred during operation due to resonance in the horizontal direction. Strong corrosion of existing spring elements.

Replacement with 11 VICODA spring elements with special coating for highly corrosive medium. Vertical tuning frequency of the setup approx. 7 Hz, degree of isolation 55%. Reduction of vibrating movements due to increased horizontal rigidity.

Vibration reduction through vibration-isolated installation of a medal press with a total weight of approx. 10 t and 80 strokes/min. The damping was to be chosen so that the press is at rest before the next lifting process, so as not to interfere with the production process.

Delivery of 4 spring elements with integrated damping > 10% and a load capacity of max. 130 kN (29,225.16 lbf). Vertical tuning frequency approx. 7 Hz

Vibration reduction through vibration-isolated installation of a toggle press with a total mass of approx. 225 t and 25 strokes/min. The damping was to be chosen so that the press is at rest before the next lifting process, so as not to interfere with the production process.

Delivery of 4 spring elements with integrated damping of approx. 10% and a vertical tuning frequency of 4.2 Hz and a load capacity of 650 kN (146,13 lbf) per spring element.

Limitation of the dynamic forces applied to the ground by vibration-isolated installation of a gas engine with generator with a total mass of approx. 106t. In addition to vibration isolation of the operating loads, earthquake requirements were also taken into account in the design of the spring elements and dampers.

Delivery of 10 spring elements with a damping degree of 11% and a load capacity of max. 147 kN (33,046.91 lbf)per spring element. Vertical tuning frequency of the setup of approx. 2.6 Hz, degree of isolation 90%.

Reduction of operating vibration amplitudes by a factor of 6 on a condensation line by installing viscoelastic dampers. Fatigue cracks were already evident on the weld seams due to impermissible operating amplitudes.

Vibration measurement and selection of suitable viscoelastic damper. Design and manufacture of the bearing steel construction. Vibration reduction by a factor of 6.

Vibration reduction through a TMD with an efficiency of 22 dB in a temperature range of -7 °C to + 55 °C. Significant vibrations on an aftercooling line of a compressor (DN250).

Installation of Pipe TMDs with a mass of 350 kg (771.62 lbs), a natural frequency of 6.4 Hz (5.9 Hz) and a damping of 20% of the critical damping. The vibration amplitude is ± 9 mm (0.35").

Reduction of vibration velocities through active absorption on the pipeline. Process-induced vibration excitation by the rising medium in the pipe, which meets at the top end of a double 45° deflection.

Installation of an active tuned mass damper with a total mass of 147 kg (324.08 lbs) and a frequency range of 1–200 Hz.

Vibration-isolated mounting of a turbine deck with a total static weight of approx. 6390 t for a 910 MW steam turbine.

Use of a total of 36 steel spring elements of the GT series with a single load capacity of up to 2158 kN.

Vibration isolated installation up of an induced draft fan with a total static mass of approx. 500 t.

Installation of 28 steel spring elements, some with integrated high-viscosity damping of the GI/GID series with a single load capacity of up to 412 kN (92621.28 lbf). To do this, the foundation without fan had to be raised by approx. 50 mm (1.97"), using a total of 8 hydraulic cylinders, and then lowered again after installation of the steel spring elements.