Practice Final Problem 10 solution

Practice Final Problem 10 solution - (Fall 2002) Water with...

This preview shows pages 1–2. Sign up to view the full content.

Name________________________ Page 1 of 2 12/8/2005 (Fall 2002) Water with weight density 3 f 62.4 lb / ft flows through a linear resistance of 5 f 400 lb s / ft R = to a tank of area 2 .624 ft A = through a very short tube (no inertance). The applied pressure comprises an infinite series of pulses, each of magnitude 2 f 124.8 lb s/ft , 2 seconds apart. Give units for all numerical answers. a) Evaluate the compliance of the tank. 2 5 3 f f .624 ft ft .01 62.4 lb /ft lb A C g ρ = = = b) Model the system with a bond graph. From the graph, in P q q R RC = - d Or in P q q RC R + = d c) Evaluate any critical time constant or natural frequency. Noting that the system equation is of the form ( ) x x f t τ + = d , the critical time constant is 5 f 2 f lb s ft 400 .01 4 s ft lb RC = = = . d) Determine the average applied pressure and the resulting average depth of the water in the tank. The average input is found by averaging over a single input period. Thus ( ) / 2 / 2 t T t T avg P t dt P T

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/29/2008 for the course ME 242 taught by Professor Perreira during the Spring '08 term at Lehigh University .

Page1 / 2

Practice Final Problem 10 solution - (Fall 2002) Water with...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online