# ps12 - M A SSA C H USE T T S I NST I T UT E OF T E C H NOL...

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1 2 3 4 5 6 M ASSAC HUSE T T S I NST I T UT E OF T E C HNOL OG Y± P res enta tions : . (P roblem 1) . (P roblem 2) . (P roblem 3) . (P roblem 4) . (P roblem 5) . S elf E va lua tion in a nother s heet a s per the ins truc tions in the firs t c la s s . T hink about thes e problems before cla s s a nd come prepa red to a s k me about what you don’t unders tand. However, rea d through the notes I ha nded out firs t. I am e xpecting well-prepared pres entations . F or the problem you are res pons ible for, I expect you to ha ve really worked to get it right, including coming in to talk if you don’t unders ta nd s omething. E a ch problem I a s s ign is intended to reinforce your unders ta nding of an importa nt concept a nd to give you s ome pra ctice a t applying the concept in a practical way. In mos t cas es I will try to tell you what the learning objective is . Day 31 Day 34

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1. The TLP in surge has an equation of motion and natural frequency as found in P.S. 11, a. How much horizontal force is required to cause a static surge displacement of 1 foot? b. Assume you have a periodic horizontal wind force ten times the amount found in a. It acts at the natural period in surge. Also assume you have a surge damping ratio of 5% of critical. What is the approximate surge response amplitude and phase angle with respect to the wind force? Identify the quantities: static response and dynamic amplification. c.
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## This note was uploaded on 11/29/2011 for the course CIVIL 1.018j taught by Professor Markusbuehler during the Fall '08 term at MIT.

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ps12 - M A SSA C H USE T T S I NST I T UT E OF T E C H NOL...

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