OCIMF_Mooring_Equipment_Guidelines_(Second_Edition)

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SURFACE TO CHAIN DIAMETER RATIO Old

FIGURE F7: COMPARISON OF GROOVED AND UNGROOVED SURFACE CASES

was approximately 30°. The non-dimensjonal stress factors, as detJned above, were approximately
2 and 4.6 for the upright link «(J = 90°) and !lat link (f3 == 0°) cases respectively (Figure 12 of
Buckle reference).

Comparing the Buckle results with those of the present analysis gives some indication of the
adequacy of t.he present calculation , For the 0° case (flat link), Buckle gives a stre ' only slightly
lower than the present analysis. For the 90° case (upright link) Buckle gives a stress a pproximately
70l1Jo higher. This higher value may be due, to the act-ion of the stud puttjng a concentrated load 011
tbe middle section of the link.

The comparison indicates the simplified analysis do_ne bere may n01 be as accurate as lbe finite-

element analysis performed by Buckle. Correlation is good for the 0" case, but poor for th e 90°

case. The intermediate cases of interest, i,e. (J == 25°, ma5' be less i.naceurate.

In Lhe present srudy, a more accurate analysis of the ease of a chaiH tens'iolJed over an ung-rooved

curved surface couJd have been obtained using finite-clement methods, However, a more exaet

analysis of the forces between two int.erlocking links would be necessary, A preCise definition of

the inter-link forces is a major problem. Further analysis does oot appear to be warranted.