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Unformatted text preview: Homework 3, problem 1
Solve for the approximate deﬂection of a simplysupported prestressed cable
with triangular static distributed load using the ﬁnite element Galerkin method.
Use a mesh of four equallength ﬁnite elements, and number the nodes and the
elements left to right. (a) Compare the midpoint deﬂection computed analytically and approximately. (b) Compute the transverse force analytically and
compare with the ﬁnite element result. Homework 3, problem 2
Find the natural frequencies and normal mode shapes for the rollerpin supported cable with uniform mass density using a mesh of three ﬁnite elements of
equal length. Number the nodes and the elements left to right. Integrate element wise quantities exactly. (a) Plot the normal mode shapes. (b) Calculate
the relative error of the natural frequencies. Homework 3, problem 3
Consider the free vibration of a pinpin supported cable. Construct the “SolidWorks Simulation” ﬁnite element model to compute the seventh natural frequency of free vibration using the cableuniaxial rod analogy. Use both draftand highquality tetrahedra. Find the uniform mesh size necessary for attaining
accuracy better than 1% in angular frequency. Compare the numerical results
to the analytical formulas for the prestressed cable free vibration. Produce a
brief report. 1 ...
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This note was uploaded on 04/09/2012 for the course SE 131 taught by Professor Staff during the Spring '08 term at UCSD.
 Spring '08
 staff

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