Momentum Technologies provides a high frequency tuned mass damper; the Momentum TMD. It is a state-of-the-art product for mitigating resonance vibration above 20Hz. These unique characteristics makes the Momentum TMD very suitable for solving vibration problems in small bore gas piping, often caused by FIP/FLIP (Flow Induced Pulsation).
Momentum TMD – FEATURES
- Frequency range ca. 20-300 Hz
- Reduces at least 90% of resonant vibration levels – outstanding performance superior to other tuned mass dampers
- Free hanging, requires no support
- Simple installation, can be done during operation
- No additional stress from thermal deformation
- No hot work permits required for installation
- Solutions for both topside and subsea
Through its construction and characteristics, a tuned mass damper is tuned to change the dynamics of the damped structure. By moving the modes away from the troubling excitation frequency and adding damping, resonance vibrations are reduced.
The diagram above shows the damping effect of a tuned mass damper.
Momentum TMD – THE TECHNOLOGY
A tuned mass damper, also known as a vibration absorber or reaction mass damper, is a well proven technology for mitigating vibrations. Through a cooperation between Momentum Technologies and Sandvik Coromant, this well proven technique is made available also for solving vibration problems in pipes and structures, both topside and subsea: The Momentum TMD.
Silent Tools™ is the trademark from Sandvik Coromant, for a family of tool holders for tuning, milling, boring and drilling. The tool holders are designed to minimize vibrations through a tuned mass damper inside the tool body. The tuned mass damper from Sandvik Coromant is appropriate for damping vibrations in the frequency range of ca. 20-300 Hz. This type of tuned mass damper is unique with a broadband functional frequency range and operates in all six degrees of freedom.
You can read more about Silent Tools from Sandvik here.
The damping principle to a tuned mass damper is described as a system consisting of a counter-acting mass, spring and damper, see the figure below:
Momentum TMD – INSTALLATION
The Momentum TMD is clamped to the pipe or structure to be damped, with the integrated clamp included in the delivery. The mounting can be made during operation and no hot work is needed for the installation. The Momentum TMD is free hanging and do not need any support or other foundation.
The mono-clamp design enables the damper to be fitted to pipes at various locations, for example close to bends. Momentum Technologies do also provide customized clamp or attachement solutions, for example brackets suitable for installation at valve flanges.
Momentum TMD – SUBSEA
The Momentum TMD is also suitable for solving vibration problems subsea. Retrofit is enabled since the Momentum TMD is a clamp-on device.
Momentum TMD – A COMPLETE SOLUTION
Hence a tuned mass damper changes the dynamics of the damped structure, implementation of such damper may be a complicated and time-consuming calculation and simulation exercise. Momentum Technologies provide tuning and optimization of the Momentum TMD as part of our delivery. This is made in cooperation with the client and an interface is established, through which necessary parameters are shared (for example characteristics of the dominating modes). The parameters are then used in a proprietary calculation tool where multi-mode optimization is made, seeking the best Momentum TMD solution for all modes.
Also, if measurements are needed, Momentum Technologies can provide this service as well, or provide procedures of how to carry out these if the client choses to use a local service provider instead. This approach developed by Momentum Technologies enables “word-wide” cooperation, making the delivery independent of where in the world the site is located.
Try out our Momentum TMD calculator for a simple assessment of whether the use of a high frequency tuned mass damper from Momentum Technologies will reduce resonant vibration: