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A DVD drive is mounted on a chassis and is modeled as a single-degree-of-freedom spring, mass, and damper. During normal operation, the drive (having a mass of 0.4 kg) is subject to a harmonic force of 1 N at 10 rad/s.
Because of material considerations and static deflection, the stiffness is fixed at 500 N/m and the natural damping in the system is 10 kg/s.
The DVD player starts and stops during its normal operation providing initial conditions to the module of x0 = 0.001 m and 0 = 0.5 m/s. The DVD drive must not have an amplitude of vibration larger then 0.008 m even during the transient stage. First, compute the response by numerical simulation to see if the constraint is satisfied.
If the constraint is not satisfied, find the smallest value of damping that will keep the deflection less than 0.008 m.
A lever AB of negligible weight is loosely fitted onto a 2.5-in.-diameter fixed shaft. Knowing that the coefficient of static friction between the fixed shaft and the lever is 0.15, determine the force P required to start the lever rotating counte..
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The components of the exhaust gas of a spark-ignition engine using a fuel mixture represented as C8H17 have a dry molar analysis of 8.7% CO2, 8.9% CO, 0.3% O2, 3.7% H2, 0.3% CH4, and 78.1% N2. Determine the equivalence ratio.
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Twenty ceramic specimens were tested to fracture. The measured fracture loads in N were 279, 195, 246, 302, 255, 262, 164, 242, 197, 224, 255, 269, 213, 172, 179, 143, 206, 233, 246, 295. A. Determine the Weibull modulus, m.
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At a temperature of 21°C, a cold-rolled red brass [alpha B = 17.6 x 10-6/°C] sleeve has an inside diameter of dB = 314.70 mm and an outside diameter of DB = 325 mm. The sleeve is to be placed on a steel [alpha S = 11.9 x 10-6/°C] shaft with an outsid..
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Create a (Matlab) program (not Excel!) which allows you to vary the geometric parameters (rb {bottom radius of ask; rt {top radius of ask; h { initial liquid height; A { hole area; N { number of discretization points).
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