Piezoelectric vibration exciter, especially for destructive material testing

摘要: A piezoelectric vibration exciter for generating mechanical vibrations the purpose of destructive material or specimen testing has two equally sized disk stacks, each with an even number piezoceramic disks. armature serving as a clamping device test is arranged between stacks in stiff frame having bail and base plate. The assembly containing clamped position frame. disks are energized AC voltage so that one stack will axially contract phase voltage, while other expand. As result, reciprocate at frequency input.