Wave Effects in Viscoelastic Leaf and Compression Spring Mounts

Abstract

Transmissibility expressions that take wave effects into account are derived for masses mounted on highly viscoelastic leaf springs and compression springs. Approximations suitable for large ratios of mounted mass to spring mass are introduced, and equations are derived that give the approximate magnitudes of the transmissibility peaks associated with standing wave resonances and the corresponding frequencies. The validity of these approximations is verified by comparison with directly computed results. It is shown that a leaf spring results in a higher first standing wave frequency, in lower density of transmissibility peaks, and in a higher envelope of these peaks than a compression spring of the same mass, loss factor, and static stiffness.