Note: A kinematic shaker system for high amplitude, low frequency vibration testing.

Area of Science:

• Fluid Dynamics
• Experimental Physics
• Mechanical Engineering

Background:

• Rayleigh-Bénard convection is a fundamental phenomenon in fluid dynamics.
• Controlling convection often involves external forcing, such as acceleration modulation.
• Standard vibration systems may lack the necessary parameters for specific excitation studies.

Purpose of the Study:

• To describe a newly constructed shaker system.
• To demonstrate its capability for high peak-velocity, large amplitude, low-frequency excitation.
• To highlight its application in Rayleigh-Bénard convection experiments.

Main Methods:

• The shaker system utilizes a kinematic linkage connected to two counter-rotating flywheels.
• A variable-speed electrical motor drives the flywheels.
• The system generates near-sinusoidal excitation with large displacements (15.24 cm peak-to-peak).

Main Results:

• The shaker system was successfully constructed and employed in experiments.
• It demonstrated the capability to produce high peak-velocity vibrations (up to 3.7 m/s).
• The system operated without failure under demanding conditions.

Conclusions:

• The developed shaker system offers unique capabilities beyond standard equipment.
• It is suitable for parametric excitation studies requiring specific vibration characteristics.
• This system advances experimental possibilities in fluid dynamics research.