find material index details ? Shaker Tables are devices for vibration...
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find material index details ?
Shaker Tables are devices for vibration testing. Shaker consists of an electromagnetic actuator driving a table, at frequencies up to 1000Hz, to which the test-object (a space probe, an automobile, an aircraft component or the like) is clamped (See Figure ). The shaker applies a spectrum of vibration frequencies, f, and amplitudes, A, to the test-object to explore its response. A big table operating at high frequency dissipates a great deal of power. The primary objective is to minimize this, but subject to a number of constraints itemized in Table shown below. A shaker table. It is required to be stiff, but have high intrinsic 'damping' or loss coefficient. Design requirements for shaker tables \begin{tabular}{ll} \multicolumn{1}{c}{ Design requirements for shaker tabies } \\ \hline Function & Table for vihration tester (shaker table) \\ Objective & Minimize power consumption \\ Constraints & (a) Radius, R, specified \\ & (b) Must be siff enough to avoid distortion by clamping forces \\ & (c) Natural frequencies above maximum operating frequency (to \\ avoid resonance) \\ & (d) High damping to minimize stray vibrations \\ & (e) Tough enough to withstand mishandling and shock \end{tabular}
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