ELECTROACOUSTIC MAGNETOSTRICTIVE RADIATOR Russian patent published in 2002 - IPC

FIELD: electroacoustic conversion of energy. SUBSTANCE: invention relates to gear for electroacoustic conversion of energy with use of magnetostrictive radiator and for transferring it to load. It can be employed in technological devices and systems. Increase of cyclic strength of soldered joint of package of magnetostrictive plates with acoustic transformer of elastic vibrations, raised reliability and prolonged service life of radiator are achieved thanks to placement of plates with clearance and their interconnection by interlayers of solder. Interlayers of solder between plates of package make structural unit with interlayer of solder that links package and acoustic transformer. Value of size s of interlayers of solder along length of package is minimal in absolute value positive root of transcendental equation: where λ,μ - are Lame constants for material of solder; τ_-1 - is fatigue limit of material of solder with cyclic shear; σ_-1 - is fatigue limit of material of solder under cyclic tensioncompression; α≤π - is angle at vertex of ridge of corrugation; Δb_max - is maximum shift of lateral mode of vibration of package; Δl_max - is maximum shift of longitudinal mode of vibration of package; t is thickness of interlayer of solder between package and acoustic transformer; b is width of plate of package; l is length of package. Joined surface of package of plates and acoustic transformer display pectinate corrugation. EFFECT: increased cyclic strength of soldered joint of package of magnetostrictive plates with acoustic transformer. 1 cl, 6 dwg, 1 tbl