TY - JOUR
T1 - A new damper design for machine tool structures
T2 - the replicated internal viscous damper
AU - Slocum, Alexander H.
AU - Marsh, Eric R.
AU - Smith, Douglas H.
N1 - Funding Information:
This work was made possible by funds provided by Professor Slocum's National Science Foundation Presidential Young Investigator Award (grant MSS8857749 supervised by Dr. Kenneth Chong), a grant from the M IT Leaders for Manufacturing Program, and the generous support of the LeBIond Makino Machine Tool Company. We thank Drew Devitt of Devitt Machinery for his assistance with the use of replicating polymers and Loren Power of Philadelphia Resins for providing us with many gallons of epoxy.
PY - 1994/7
Y1 - 1994/7
N2 - Good stiffness and damping are each necessary, but not individually sufficient, requirements for a precision machine. Damping provided by the materials and joints in a machine are typically low. This article introduces the concept of an internal damping device: a replicated internal viscous damper. This type of damper uses internal beams covered with a viscous fluid that are then replicated in place inside structural members. The viscous fluid first acts as a mold release and then as a very thin viscous shear layer. The design theory is developed and shown to agree with experimental results. Amplification at resonance factors (i.e., the quality factor Q) on the order of 20 are obtainable (one to two orders of magnitude better damped than many types of materials). This enables machine tool and instrument design engineers to worry less about material damping considerations, which can help to increase design options.
AB - Good stiffness and damping are each necessary, but not individually sufficient, requirements for a precision machine. Damping provided by the materials and joints in a machine are typically low. This article introduces the concept of an internal damping device: a replicated internal viscous damper. This type of damper uses internal beams covered with a viscous fluid that are then replicated in place inside structural members. The viscous fluid first acts as a mold release and then as a very thin viscous shear layer. The design theory is developed and shown to agree with experimental results. Amplification at resonance factors (i.e., the quality factor Q) on the order of 20 are obtainable (one to two orders of magnitude better damped than many types of materials). This enables machine tool and instrument design engineers to worry less about material damping considerations, which can help to increase design options.
UR - https://www.scopus.com/pages/publications/0028468831
UR - https://www.scopus.com/pages/publications/0028468831#tab=citedBy
U2 - 10.1016/0141-6359(94)90122-8
DO - 10.1016/0141-6359(94)90122-8
M3 - Article
AN - SCOPUS:0028468831
SN - 0141-6359
VL - 16
SP - 174
EP - 183
JO - Precision Engineering
JF - Precision Engineering
IS - 3
ER -