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Dynamic Analysis of Non-Linear Structures by the Method of Statistical Quadratization (Paperback, Softcover reprint of the original 1st ed. 1990)
Loot Price: R2,996
Discovery Miles 29 960
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Dynamic Analysis of Non-Linear Structures by the Method of Statistical Quadratization (Paperback, Softcover reprint of the original 1st ed. 1990)
Series: Lecture Notes in Engineering, 57
Expected to ship within 10 - 15 working days
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1. 1 Introduction As offshore oil production moves into deeper
water, compliant structural systems are becoming increasingly
important. Examples of this type of structure are tension leg
platfonns (TLP's), guyed tower platfonns, compliant tower
platfonns, and floating production systems. The common feature of
these systems, which distinguishes them from conventional jacket
platfonns, is that dynamic amplification is minimized by designing
the surge and sway natural frequencies to be lower than the
predominant frequencies of the wave spectrum. Conventional jacket
platfonns, on the other hand, are designed to have high stiffness
so that the natural frequencies are higher than the wave
frequencies. At deeper water depths, however, it becomes
uneconomical to build a platfonn with high enough stiffness. Thus,
the switch is made to the other side of the wave spectrum. The low
natural frequency of a compliant platfonn is achieved by designing
systems which inherently have low stiffness. Consequently, the
maximum horizontal excursions of these systems can be quite large.
The low natural frequency characteristic of compliant systems
creates new analytical challenges for engineers. This is because
geometric stiffness and hydrodynamic force nonlinearities can cause
significant resonance responses in the surge and sway modes, even
though the natural frequencies of these modes are outside the wave
spectrum frequencies. High frequency resonance responses in other
modes, such as the pitch mode of a TLP, are also possible.
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