Cronje, JMHeyns, PSTheron, NJLoveday, Philip W2007-06-292007-06-292005-03Cronje, JM et al. 2005. Development of a variable stiffness and damping tunable vibration isolator. Journal of Vibration and Control, Vol. 11(3), pp 381-3961077-5463http://hdl.handle.net/10204/793https://journals.sagepub.com/doi/abs/10.1177/1077546305048585https://doi.org/10.1177/1077546305048585Copyright: 2005 Sage Publications LtdIn this paper we report on the development of a variable stiffness and damping Liquid Inertia Vibration Eliminator (LIVE) vibration isolator. The result is the ability to shift the isolation frequency of the isolator and also to change the amplification at resonance. A practical variable stiffness spring was developed by using a compound leaf spring with circular spring elements. A wax actuator, controlled by a hot-air gun with a closed-loop displacement and velocity feedback control system, was used to separate the springs at the center. An experimental isolator was constructed and tested. The isolation frequency was shifted from 22.8 to 36.2 Hz by changing the stiffness of the spring by 270%. A transmissibility of less than 10% was achieved over the whole range. The viscous damping ratio was changed from 0.001 to 0.033 by increasing the flow losses in the system.enTunable vibration isolatorLiquid inertia vibration eliminatorVariable stiffness springWax actuatorArticleCronje, J., Heyns, P., Theron, N., & Loveday, P. W. (2005). Development of a variable stiffness and damping tunable vibration isolator. http://hdl.handle.net/10204/793Cronje, JM, PS Heyns, NJ Theron, and Philip W Loveday "Development of a variable stiffness and damping tunable vibration isolator." (2005) http://hdl.handle.net/10204/793Cronje J, Heyns P, Theron N, Loveday PW. Development of a variable stiffness and damping tunable vibration isolator. 2005; http://hdl.handle.net/10204/793.TY - Article AU - Cronje, JM AU - Heyns, PS AU - Theron, NJ AU - Loveday, Philip W AB - In this paper we report on the development of a variable stiffness and damping Liquid Inertia Vibration Eliminator (LIVE) vibration isolator. The result is the ability to shift the isolation frequency of the isolator and also to change the amplification at resonance. A practical variable stiffness spring was developed by using a compound leaf spring with circular spring elements. A wax actuator, controlled by a hot-air gun with a closed-loop displacement and velocity feedback control system, was used to separate the springs at the center. An experimental isolator was constructed and tested. The isolation frequency was shifted from 22.8 to 36.2 Hz by changing the stiffness of the spring by 270%. A transmissibility of less than 10% was achieved over the whole range. The viscous damping ratio was changed from 0.001 to 0.033 by increasing the flow losses in the system. DA - 2005-03 DB - ResearchSpace DP - CSIR KW - Tunable vibration isolator KW - Liquid inertia vibration eliminator KW - Variable stiffness spring KW - Wax actuator LK - https://researchspace.csir.co.za PY - 2005 SM - 1077-5463 T1 - Development of a variable stiffness and damping tunable vibration isolator TI - Development of a variable stiffness and damping tunable vibration isolator UR - http://hdl.handle.net/10204/793 ER -