Clasification Society Rulefinder 2020 - Version 9.33 - Fix
Common Structural Rules - Common Structural Rules for Bulk Carriers and Oil Tankers, January 2019 - Part 1 General Hull Requirements - Chapter 9 Fatigue - Section 4 Simplified Stress Analysis - 2 Hot Spot Stress

2 Hot Spot Stress

2.1 Hot spot stress range

2.1.1

The hot spot stress range, in N/mm2, due to dynamic loads for load case (i) of loading condition (j) is obtained from the following formula:

where:

σGD,i1(j), σGD,i2(j): Stresses due to global hull girder wave bending moments, in N/mm˛, as defined in [3.1.1].

σLD,i1(j), σLD,i2(j): Stresses due to local dynamic pressure, in N/mm˛, as defined in [4.1.1].

σdD,i1(j), σdD,i2(j): Stresses due to relative displacement in wave, in N/mm˛, as defined in [4.2.4] and [4.2.5].

2.2 Hot spot mean stress

2.2.1

The hot spot mean stress, in N/mm2, due to static and dynamic loads for load case (i) of loading condition (j) is obtained from the following formula:

σmean, i(j) = σGS, (j) + σLS, (j) + σdS, (j) + σmLD, i(j) + σmGD, i(j)

where for the load case (i) of loading condition (j):

σGS, (j) : Stress due to still water hull girder bending moment, in N/mm˛, as

σLS, (j) : Stress due to local static pressure, in N/mm˛, as defined in [4.1.2].

σdS, (j) : Stress due to relative displacement in still water, in N/mm˛, as defined in [4.2.7].

σmLD, i(j) : Mean stress due to local dynamic pressure, in N/mm˛, as defined as:

σLD,i1(j), σLD,i2(j): Stress due to local dynamic pressure, in N/mm˛, as defined in [4.1.1].

σmGD, i(j) : Mean stress due to global wave bending moment, in N/mm˛, as defined as:

σGD,i1(j), σGD,i2(j): Stress due to global wave bending moment, in N/mm˛, as defined in [3.1.1].

Parent topic: Section 4 Simplified Stress Analysis
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