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Frank wrote:
"Spike" wrote in message .. . Frank wrote: The spring and damper can be exactly model as an electrical analog; I'm sure you're right. However, a coil/capacitor is not a model or analogue of a spring/damper system. It was discussed extensively at the time. I am not sure I understand your response. To be exact a "spring/damper" can be modeled as a coil/resistor. I refer you my other post on the subject, where I quote the OP in full. For resonance to occur you need a capacitor/inductor, or mass/spring. All components of either mechanical or electrical circuits require the solution of the same simple differential equation, such as i = C*dv/dt etc. No-one was arguing that that was not the case. A spring might have the mechanical equivalent of reactance, but a damper will most certainly not - hence the rubbish posted by the OP, where he believes that dampers store energy. They do not, and therefore cannot have the mechanical equivalence of a reactance. Therefore, resonance is not possible with such a system. In the extreme, the OP was reduced to likening dampers to bicycle pumps, a sure sign of a failure to grasp a fundamental point (and hence the error of his assertion). from Aero Spike |