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state space analysis - 27.12

applied at point ’a’ in the positive ’x’ direction.

 

 

 

 

 

 

 

 

 

 

 

 

 

–1

 

 

 

 

 

103

0

–103

0

0

0

 

xa

 

 

 

 

 

 

 

 

 

10

y

 

 

 

0

103

0

0

0

–103

 

a

 

 

0

 

 

 

 

–103

 

103

 

 

 

 

 

 

xb

=

0

0

0

0

 

 

0

 

yb

 

 

 

 

103

 

 

 

 

0

 

 

0

0

0

0

0

 

 

 

xd

 

0

0

0

0

103

0

 

 

0

 

 

 

 

0

 

yd

 

 

 

–103

 

 

 

103

 

 

 

 

 

0

0

0

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This method generates very large matrices, easily into the millions.

To reduce the matrix size techniques such as symmetry are commonly used.

Strains can be found by calculating the relative displacements of neighboring points. These can then be used to calculate the stresses.

More complex elements are commonly used depending upon the stress conditions, part geometry and other factors.

There are a variety of finite element element methods and applications

Computation Fluid Dynamics

Nonlinear deformation

27.4 SUMMARY

state space analysis - 27.13

27.5PRACTICE PROBLEMS

27.6PRACTICE PROBLEM SOLUTIONS

27.7ASSIGNMENT PROBLEMS

1.

27.8 BIBLIOGRAPHY

How, J, "16.31 Feedback Control Course Notes", MIT Opencourseware website.