mechanical impedance definition of mechanical impedance in the Free Online Encyclopedia.

mechanical impedance [mi′kan·ə·kəl im′pēd·əns]

(mechanics)

The complex ratio of a phasor representing a sinusoidally varying force applied to a system to a phasor representing the velocity of a point in the system.

Mechanical impedance

For a system executing simple harmonic motion, the mechanical impedance is the ratio of force to particle velocity. If the force is that which drives the system and the velocity is that of the point of application of the force, the ratio is the input or driving-point impedance. If the velocity is that at some other point, the ratio is the transfer impedance corresponding to the two points.

Mechanical impedance is a complex quantity. The real part, the mechanical resistance, is independent of frequency if the dissipative forces are proportional to velocity; the imaginary part, the mechanical reactance, varies with frequency, becoming zero at the resonant and infinite at the antiresonant frequencies of the system. See Forced oscillation, Harmonic motion

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No references found	Blake21 presented a good argument that machines for simulating shock (as well as sinusoidal and random vibration) cannot afford to neglect the mechanical impedance of the item under test. An Historic View of Shock and Vibration by Henry C Pusey / Sound and Vibration The method is based on measuring the mechanical impedance of a sample. Sugars facilitate starch retrogradation in cereal grains by Emerging Food R&D Report Because a DMA's three and velocity can be varied independently across a wide range (by altering the length, width and thickness of the piezo crystal beam, and by adding any necessary beams), the exciter's mechanical impedance can be adjusted in a manner unachievable with conventional moving coil or piezoelectric exciters. Flat panel speakers for PDAs by Designfax	Mechanical Comparator mechanical computer mechanical connection mechanical core mechanical damping mechanical dewaxing mechanical dialer mechanical differential analyzer mechanical draft mechanical drawing mechanical dysmenorrhea mechanical efficiency mechanical energy mechanical engineering mechanical equation of state mechanical equipment room Mechanical Equivalent of Heat Mechanical Equivalent of Light mechanical erosion mechanical expression mechanical filter mechanical flotation cell mechanical gripper mechanical hygrometer mechanical hysteresis mechanical impedance mechanical instability mechanical integrator mechanical jamming mechanical joint mechanical keyboard mechanical lift dock mechanical linkage mechanical loader mechanical mass mechanical metallurgy mechanical modulator mechanical mouse mechanical mucking mechanical mule Mechanical Musical Instruments mechanical ohm mechanical oil valve mechanical operator mechanical oscillograph mechanical patent Mechanical Piano Mechanical Pick mechanical plating mechanical plotting board mechanical press	mechanical fragility mechanical fragility Mechanical Front Wheel Drive Mechanical Front-wheel Drive Mechanical fuel injection Mechanical fuel pump Mechanical fuel pump mechanical gas admission valve mechanical gripper Mechanical Ground Support Equipment Mechanical Ground Support System Mechanical hackamore Mechanical hackamore Mechanical Handling Engineers Association Mechanical heart Mechanical heart Mechanical heart Mechanical Heart Valve Replacement Mechanical heart valves mechanical heart-lung Mechanical Heat Recovery and Ventilation Mechanical Hound Mechanical Hydraulic Control Mechanical Hydrotest mechanical hygrometer mechanical hysteresis mechanical ileus mechanical ileus mechanical ileus Mechanical Impact Wrench mechanical impedance Mechanical Impedance Measuring Device Mechanical Industrial and Technical Calculations Mechanical Industry Research Laboratories mechanical infertility mechanical infusion pump Mechanical Inspection mechanical instability mechanical instability mechanical instrument Mechanical Insufflation-Exsufflation mechanical integrator Mechanical Integrity & Quality Assurance Mechanical Interface Drawing Mechanical Investing Mechanical Investing mechanical irritation mechanical irritation mechanical irritation mechanical jamming mechanical jaundice mechanical jaundice mechanical jaundice mechanical jaundice Mechanical Joint Mechanical Joint Mechanical Joint Tightness Mechanical Jurisprudence mechanical keyboard Mechanical larynx Mechanical Lash Adjuster

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Blake21 presented a good argument that machines for simulating shock (as well as sinusoidal and random vibration) cannot afford to neglect the mechanical impedance of the item under test.

An Historic View of Shock and Vibration by Henry C Pusey / Sound and Vibration

The method is based on measuring the mechanical impedance of a sample.

Sugars facilitate starch retrogradation in cereal grains by Emerging Food R&D Report

Because a DMA's three and velocity can be varied independently across a wide range (by altering the length, width and thickness of the piezo crystal beam, and by adding any necessary beams), the exciter's mechanical impedance can be adjusted in a manner unachievable with conventional moving coil or piezoelectric exciters.

Flat panel speakers for PDAs by Designfax

Mechanical Comparator

mechanical computer

mechanical connection

mechanical differential analyzer

mechanical draft

mechanical drawing

mechanical dysmenorrhea