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<br />LJ <br />0 <br />0 <br />r r <br />r r <br />r ~ <br />r r <br />r r <br />r r <br />r ~ <br />O ^ ^ ^ i ^ ~® <br />O ~ r + r <br />r ~~ <br />~+ t r r <br />+ 6-inch, FRONT <br />O 6-inch, TOP <br />^ 20-inch, TOP <br />!~ 20-inch, FRONT <br />8 <br />5 10 <br />GROUND VIBRATION, RADIAL, irVS <br />15 <br />Figure 6.- Circumferential strain and surface radial vibration <br /> <br /> <br />O <br />LL <br />Z <br />O <br />F <br />m <br />w <br />z <br />J <br />W <br />a <br />a <br />10 <br />9 <br />8 <br />7 <br />6 <br />5 <br />4 <br />3 <br />2 <br />1 <br />0 <br />0 <br />250 <br />~ zoo <br />z_ <br />150 <br />100 <br />v <br />u 50 <br />146 <br />2 4 6 8 10 12 14 16 ltf <br />GROUND VIBFL4TION, RADIAL, inls <br />Figure 5.- Ground and pipeline vibrations <br />