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Currently, the linear motor has replaced the transmission mechanism composed of a rotary motor and a screw, and is widely used in direct drive applications such as computer numerical control (CNC) machine tools. As the thrust density of traditional linear permanent magnet synchronous motor is difficult to be further improved, linear permanent magnet vernier motors (LPMVM) based on magnetic field modulation...
We derive in this paper equations of motion of board-level IC packages subjected to swept sine vibration loads following the support excitation scheme. Harmonic analysis is performed based on the argument such that at each loading state over the swept sine process, hysteresis responses of solder joints following the isotropic hardening rule vanish fairly quickly so that plasticity is fully developed...
The authors derive in this paper equations of motion of board-level electronic packages subjected to swept sine vibration loads following the support excitation scheme. A single degree of freedom elastoplastic structural system is constructed to benchmark multi-step harmonic analysis schemes proposed in this study. Applications of the harmonic analysis schemes to calculating response spectra of a...
We derive in this paper equations of motion of board-level electronic packages subjected to swept sine vibration loads following the support excitation scheme. Harmonic analysis is performed based on the argument such that at each loading state over the swept sine process, hysteresis responses of solder joints following the isotropic hardening rule vanish fairly quickly so that plasticity is fully...
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