# HW4 - ME 375 HOMEWORK 4 Spring 2009 Out February 4 2009...

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

ME 375 HOMEWORK # 4 Spring 2009 Out: February 4, 2009 Due: February 11, 2009 (at the beginning of class) PROBLEM 1: (40%) Consider the following set of differential equations that represent an engine supported by elastomeric mounts and excited by a reciprocating force, f ( t ) (see Figure 1): = + + 0 ) ( 5 . 0 5 . 0 5 . 0 5 . 1 1 . 0 0 0 0 0 0 0 1 t f y x y x y x ± ± ± ± ± ± These equations describe an engine, which is isolated from its chassis by a mount that possesses frequency dependent damping and stiffness. Answer the following questions. Figure 1 (a) Solve for the Laplace transforms, X ( s ) and Y ( s ), of x ( t ) and y ( t ), respectively, in terms of the Laplace transform, F ( s ), of f ( t ) and the initial conditions of the system. (b) For f ( t ) = 0 N with initial conditions y (0) = 0 m, x (0) = 0 m, and 1 . 0 ) 0 ( = x ± m/s, solve for x ( 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.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern