arrow_back_ios

Main Menu

See All Acoustic End-of-Line Test Systems See All DAQ and instruments See All Electroacoustics See All Software See All Sensors See All Vibration Testing Equipment See All Academy See All Resource Center See All Applications See All Industries See All Insights See All Services See All Support See All Our Business See All Our History See All Sustainability See All Global Presence
arrow_back_ios

Main Menu

See All Actuators See All Combustion Engines See All Durability See All eDrive See All Transmission Gearboxes See All Turbo Charger See All DAQ Systems See All High Precision and Calibration Systems See All Industrial electronics See All Power Analyser See All S&V Hand-held devices See All S&V Signal conditioner See All Wireless DAQ Systems See All Pinnae See All Accessories See All DAQ See All Drivers API See All nCode - Durability and Fatigue Analysis See All ReliaSoft - Reliability Analysis and Management See All Test Data Management See All Utility See All Vibration Control See All Inertial Sensor Software See All Acoustic See All Current / voltage See All Displacement See All Exciters See All Force See All Inertial Sensors See All Load Cells See All Pressure See All Smart Sensors IO-Link See All Strain See All Torque See All Vibration See All Shaker Systems See All Power Amplifiers See All Vibration Controllers See All Training Courses See All Whitepapers See All Acoustics See All Custom Sensors See All Data Acquisition & Analysis See All Durability & Fatigue See All Electric Power Testing See All Industrial Process Automation See All Machine automation control and navigation See All NVH See All Reliability See All Smart Sensors See All Structural Health Monitoring See All Vibration See All Weighing See All Automotive & Ground Transportation See All Robotics See All Calibration See All Installation, Maintenance & Repair See All Support Brüel & Kjær See All Release Notes See All Compliance See All Our People
arrow_back_ios

Main Menu

See All CANHEAD See All GenHS See All LAN-XI See All MGCplus See All Optical Interrogators See All QuantumX See All SomatXR See All Fusion-LN See All Accessories See All Hand-held Software See All Accessories See All Wireless Gateways See All Wireless Nodes See All BK Connect Pulse See All API See All Microphone sets See All Cartridges See All Special Microphones See All Acoustic Calibrators See All Microphone Pre-amplifiers See All Sound Sources See All Acoustic Transducer Accessories See All Accessories See All Power amplifier See All Accessories for exciters See All Accessories See All Digital load cells See All Accessories See All Experimental testing See All Transducer Manufacturing (OEM) See All Accessories See All Non-Rotating Torque Transducers See All Rotary Torque Sensors See All CCLD (IEPE) accelerometers See All Charge Accelerometers See All Impulse hammers / impedance heads See All Tachometer Probes See All Cables See All Accessories See All Electroacoustics See All Noise Source Identification See All Handheld S&V measurements See All Sound Power and Sound Pressure See All Noise Certification See All Electrical Devices Testing See All Electrical Systems Testing See All Grid Testing See All High-Voltage Testing See All Infrastructures Monitoring See All Rail Monitoring See All Vibration Testing with Electrodynamic Shakers See All Structural Dynamics See All Machine Analysis and Diagnostics See All Process Weighing See All Calibration Services for Transducers See All Calibration Services for Handheld Instruments See All Calibration Services for Instruments & DAQ See All On-Site Calibration See All Resources See All Brüel & Kjær Downloads See All Software License Management

Vibroacoustic project

Innovation first! Novares Group, a supplier of plastic solutions for the automotive industry, is driven by innovation, also reflected in its name. The company defines itself with the great phrase “We are a multi-specialist supplier”. In 2017, the Mecaplast and Key Plastics merger was rebranded as Novares. Today, with 42 production plants worldwide, 8 technical centres and eight centres of excellence, Novares focuses strongly on expansion and innovation in the complex field of automotive plastics. For example, Novares has become a member of the French association of players in the hydrogen sector, an opportunity to collaborate with other stakeholders in that sector, and the ‘Novares Startup Program’ enables start-ups and young companies to collaborate with major players in domains related to green mobility, vehicle user interfaces and automotive safety and comfort.

 

The technical team from the Lens Centre of Excellence had a new vibroacoustic project, and submitted their specifications to Technical Sales Engineer, Bruno Durand, who coordinated the project, and closely followed its progress. For the technical part, Bruno was supported by Bertrand Foulard, HBK’s vibration expert. The HBK team, with its involvement in automotive research, knowledge of applications such as plastic deformations, electric battery current measurements, and expertise in the vibroacoustic field, quickly established itself as a key supplier of electrodynamic shakers to Novares.

 

For this kind of project, numerous discussions and site visits are necessary, including a pre-sales visit to the technical department regarding the setup and installation the new equipment in the specially designed building, which was then still under construction. To get acquainted with the new requirements of the plastic industry, in depth discussions were had with Mr. Dufour, responsible for the Lens Novares laboratory. He explained the plastic issue: 

"When it comes to the automotive industry’s criteria for material that will be used in the near future, plastic remains the reference material due to its potential for mass gain and flexibility. The final products must be recyclable, which is already a challenge, as they contain recycled material whose properties are ultimately too variable and the recycling channels too weak. Plastics must be able to withstand the increasingly delicate moulding requirements and the higher under the bonnet temperatures of 3-cylinder engines – small displacement engines that are becoming more common due to their increased performance. The Lens Center of Excellence is constantly involved in improving the performance of this material and, for example, integrates increasingly sophisticated oil and air separation systems (decanter) into its engine head covers. Plastic is still a lighter material, but the vibration profiles to which it is subjected have also evolved with engine size and require even more rigorous design to avoid premature wear and breakage of parts. In addition, vehicles must be quiet despite increasing stresses induced by vibration, and plastic plays a significant role in noise reduction. HBK was able to take these criteria into account and guide us towards the best possible solution with a shaker capable of carrying out a very wide range of our current and future tests, a future turned towards the evolution of electric and hydrogen engines.”

 

Current specifications involve testing at relatively high levels of acceleration, and unusual test times of several hundred hours. This long duration requires the shaker to be reliable and regularly maintained, and this was, of course, important when choosing a solution. HBK’s flexible and adaptable maintenance plans fitted Novares’ requirements perfectly. The tests carried out by Novares included testing the vibratory integrity of individual parts by fixing them directly onto supports, representative of their final environment, and testing complete systems with large dimensions requiring stand-alone slip table HBT1220 – an integrated combo system equipped with a horizontal table with hydrostatic bearings that are highly resistant to the overturning moments generated by the transverse reactions of the products being tested. A table of this type has a large mass, requiring a powerful shaker but is perfectly suited to the 90 kN power of the V8900.

 

In addition to the effects of vibration, plastics behave differently in different temperatures, so most vibration tests are performed in a climatic chamber. The V8900 system and its slip table have been optimized for easy adaptation to the different climatic chamber models available on the market. Vibration tests combined with climatic tests are one of the most representative of the real environment and the most effective in terms of immediate results that can be used to understand the products tested.

 

  • The V8900 shaker is the most powerful air-cooled shaker in the LDS shaker range, with features designed specifically for the needs of the automotive and aerospace industries. Some of the highlights that cover the needs of Novares include:
  • A force of 80,000 newtons in sinusoidal mode and 76,200 newtons in random mode
  • Air cooled, no need for a costly and complex water system
  • 101.6 mm peak-to-peak (4 inch) displacement and a high frequency range for a vibrator of this size (up to 3 kHz) to accommodate the most severe shock and sine mode testing
  • Unprecedented resistance to overturning moments to accommodate payloads of up to 800 kg, even when highly reactive, that is, when significant transverse forces may be generated, but these are well supported by the shaker coil and, of course, the horizontal table, which has proven its strength in many applications.

 

With the expected economic upturn, Novares Group now has an ideal tool that will enable them to continue testing the results of their research in the fascinating field of plastics and their derivatives.

Novares is a global plastic solutions provider that designs and manufactures complex components and systems serving the automotive industry of the future.

 

Support Content