Vibration, dynamics and noise

formerly BETA Machinery Analysis and SVT Engineering Consultants

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DamperX™ Vibration Clamps, Braces, Supports

Damping products to reduce vibration (superior performance for demanding applications)

DamperX Clamp 

 DamperX Brace

   DamperX Cylinder Head-End Support

Vibration is a leading cause of piping fatigue failures and can cause safety risks, environmental damage and downtime. Each is a major consequence to facility operators.

Traditional pipe clamps often do not produce a satisfactory solution for vibratory loads. The vibration can be shifted elsewhere on the structure, or the clamp is not effective at all operating speeds or conditions.

DamperX™ is Wood Group’s line of products that addresses these issues. Building on research done with the Gas Machinery Research Council (GMRC), our DamperX products have a proven track record of significantly reducing vibration compared to standard steel and other lined clamps and supports. 

Damping: What Is It and How Does It Work?

Damping is a proven solution to control vibration and is used extensively in the automotive and aerospace industries (think of the shocks in your car).

Wood Group has applied this technology to industrial applications involving piping, compressors, pumps, and related equipment. This new solution provides a cost-effective approach to absorb vibration energy and reduce stress, thereby preventing fatigue failures.

Effects of damping on vibration decay

Welded piping systems typically have very low damping. When vibration forces occur, these piping systems become highly responsive when resonant, leading to amplified vibrations and fatigue failures. With low damped systems, vibration ringdown time after the initial event can be severely long.   

A DamperX product adds significant damping to the system.
The figure (right) illustrates how damping absorbs vibration energy. An undamped system (red line) will continue to ring. Adding damping absorbs the vibration energy and reduces stress on the piping system (orange and blue lines).

Development testing revealed that many commercially available clamp liners actually increase vibration amplitude, due to a decrease in stiffness. The viscoelastic material used in Wood Group’s DamperX products provides a unique combination of stiffness and damping, resulting in a significant reduction of overall piping vibration.

Another advantage of damping is the ability to absorb energy across a wide frequency range (up to 500 Hz). Vibration will occur at many frequencies. A traditional steel brace will be resonant at specific frequencies (eg, at its natural frequency) and result in excessive vibration. Damping has been proven to absorb energy across all frequencies. 

Applications

Wood Group's DamperX products are uniquely designed for:

Facilities

  • Oil and gas facilities (onshore and offshore)
  • Refineries
  • Pipeline stations
  • Water treatment plants
  • Other applications subject to vibration

Piping, vessels and machinery systems

  • Main process piping
  • Compressor systems
  • Pump systems
  • Scrubbers
  • Pulsation bottles
  • Flare and fire water piping
  • Other vibration applications
DamperX™ Products

See this one-pager for an overview of VDN's anti-vibration products

1. Clamps

DamperTech pipe clamp to reduce vibrationWood Group’s DamperX clamps have a damping material liner and require the provision for a damping material pad under the piping (dimensioned installation drawings are available on request). The clamps are intended for suction piping or piping downstream of after-coolers, and are effective at temperatures from 1°F to 400°F (-17°C to 204°C).

Advantages
  • Superior vibration reduction compared to alternative pipe clamps that only add stiffness
  • Reduces likelihood of moving the vibration problem elsewhere
  • DamperX vibration clamp before after effectiveCost-effective and reliable method to control resonant and non-resonant vibration
  • Ideal for high-speed and variable-speed applications
  • Field data has shown that DamperX clamps reduce vibration 40 to 90% when compared to conventional steel clamps
  • Engineered solution based on FEA and damping modeling techniques
  • Customized design for OEM, packagers and customer-defined requirements
  • With a lower coefficient of friction than conventional clamps (µ= 0.15 to 0.25), DamperX clamps are designed to permit axial pipe movement due to thermal expansion

Email us today, or call +1 403 245 5666 to order or get more information on price, delivery, and installation.
Brochure (PDF)

Failed clamps from undampened systems
 
There are many examples where traditional pipe clamps are unable to control machinery and vibratory loads
2. Braces

Wood Group has developed a variety of DamperX brace models designed for main process piping and vessels. As opposed to adding only stiffness to a vibrating system, the DamperX support contains a viscoelastic element which absorbs the vibration of the component instead of transmitting it to the supporting structure.

The DamperX brace must be rigidly attached in the correct location and orientation for effective reduction of vibration.

Aluminum, stainless steel, and carbon steel versions are available. The unit can be configured for different lengths and connections. Band clamp and skid lugs hardware is provided for retrofit applications. Installation instructions are provided in both electronic and hard-copy versions.

Advantages
  • Superior vibration reduction compared to alternative supports that only add stiffness
  • Reduces likelihood of moving the vibration problem elsewhere
  • Cost-effective and reliable method to control resonant and non-resonant vibration
  • Works across a wide speed range thus ideal for variable speed machines
  • Ease of installation with the ability to install while equipment running and at operating temperatures
  • Higher confidence that desired vibration reduction will be achieved compared with traditional brace
  • Engineered solution based on unique FEA and damping modeling techniques
  • Much smaller and less intrusive than traditional braces for the equivalent vibration reduction
  • Customized design for OEMs, packagers, and customer-defined requirements

Email us today, or call +1 403 245 5666 to order or get more information on price, delivery, and installation.
Brochure (PDF) (coming soon)

3. Cylinder Head-End Supports

The cylinder support is currently in testing. Please contact us for demo applications.

Advantages
  • The viscoelastic material support reduces vibration at all frequencies. Conventional all steel supports often simply move vibration problems to a higher frequency.
  • Ease of fit-up and installation. Improper alignment of a rigid, all-steel supports can create misalignment within the compressor. The DamperX support eliminates installation problems; its material is relatively pliable and the design allows for easy alignment.
  • Engineered to meet the optimal stiffness and damping requirements of the specific compressor application, using unique FEA and damping modeling techniques.

 

Technical support

Owners rely on Wood Group’s experts to mitigate vibration, dynamics, and stress issues.
Our specialist will:

  • Provide troubleshooting and vibration assessments at your site
  • Identify the best vibration solution
  • Verify and document that the modifications are successful and meet your integrity and reliability specifications
Related Information and Services
  • Equipment Piping on compressors and pumps (including vessels); any other resonant equipment 
    Vibration frequency  5 -150 Hz
    Equipment weight Up to 9,000 lbs (4,000 kg). Customized solutions available for larger applications
    Temperature Application dependent – contact VDN
    Application Product sized by Wood Group’s vibration experts

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