Hi all.
I have an extremely tricky problem that I have no idea how to program into Mathcad as my experiance is limited to say the least.
I have two tables as shown below I have a number of scenarios I need to run to get the correct data.
1. Gc = 0.111 - Therefor can use Table A-2 only.
N = 0.002 - Can use the N≤0.003 side of the table.
M = 0.65 - Have to interpolate between 0.6 and 0.8.
Results required for - C1, C2, C3 and Kb. I have worked these out as C1 = 0.25, C2=7.75, C3=0.6, Kb=8.75
2. Gc = 0.111 - Therefor can use Table A-2 only.
N = 0.004 - Interpolate between the N≤0.003 side and 0.006 ≤ N ≤ 0.024 side of the table.
M = 0.65 - Have to interpolate between 0.6 and 0.8.
Results required for - C1, C2, C3 and Kb. I have worked these out as C1 = 0.242, C2=7.167, C3=0.6, Kb=9.17
3. Gc = 0.111 - Therefor can use Table A-2 only.
N = 0.01 - Can use the 0.006 ≤ N ≤ 0.024 side of the table.
M = 0.65 - Have to interpolate between 0.6 and 0.8.
Results required for - C1, C2, C3 and Kb. I have worked these out as C1 = 0.225, C2=6, C3=0.6, Kb=10
4. Gc = 0.155 - Therefor have to interpolate between Table A-2 and A-3.
N = 0.004 - Interpolate between the N≤0.003 side and 0.006 ≤ N ≤ 0.024 side of table A-2 and A-3.
M = 0.65 - Have to interpolate between 0.6 and 0.8 on table A-2 and A-3
Results required for - C1, C2, C3 and Kb.
I have worked these out as C1 = 0.176, C2=7.07, C3=0.56, Kb=9.00
I have included the excel spread sheet I used to get the results.
Hope someone can help.
Kind Regards
Chris.
| Table A-2 Parameters for calculating minimum weight, L10/(2 + M)2, for pipe on clay, Gc = 0.111 | ||||||||
| Gc = 0.111 | ||||||||
| N ≤ 0.003 | 0.006 ≤ N ≤ 0.024 | |||||||
| M | C1 | C2 | C3 | Kb | C1 | C2 | C3 | Kb |
| ≤ 0.2 | 0.1 | 9 | 0.6 | 10 | 0.1 | 7 | 0.6 | 10 |
| 0.4 | 0.1 | 8 | 0.6 | 10 | 0.1 | 7 | 0.6 | 10 |
| 0.5 | 0.1 | 8 | 0.6 | 10 | 0.1 | 7 | 0.6 | 10 |
| 0.6 | 0.2 | 8 | 0.6 | 10 | 0.2 | 6 | 0.6 | 10 |
| 0.8 | 0.4 | 7 | 0.6 | 5 | 0.3 | 6 | 0.6 | 10 |
| 1 | 0.4 | 7 | 0.6 | 5 | 0.4 | 6 | 0.6 | 10 |
| 1.5 | 0.4 | 5 | 0.6 | 5 | 0.8 | 4 | 0.6 | 10 |
| 2 | 0.7 | 3 | 0.6 | 5 | 1.5 | 0 | 0.6 | 10 |
| ≥ 4.0 | 1.4 | 1 | 0.6 | 5 | 1.5 | 0 | 0.6 | 10 |
| Table A-3 Parameters for calculating minimum weight, L10/(2 + M)2, for pipe on clay, Gc = 0.222 | ||||||||
| Gc = 0.222 | ||||||||
| N ≤ 0.003 | 0.006 ≤ N ≤ 0.024 | |||||||
| M | C1 | C2 | C3 | Kb | C1 | C2 | C3 | Kb |
| ≤ 0.2 | 0.1 | 8 | 0.5 | 15 | 0.1 | 8 | 0.5 | 10 |
| 0.4 | 0.1 | 7 | 0.5 | 10 | -0.3 | 8 | 0.5 | 10 |
| 0.5 | 0.1 | 7 | 0.5 | 10 | -0.1 | 7 | 0.5 | 10 |
| 0.6 | 0.1 | 7 | 0.5 | 10 | 0 | 7 | 0.5 | 10 |
| 0.8 | 0.1 | 7 | 0.5 | 5 | 0.1 | 6 | 0.5 | 5 |
| 1 | 0.1 | 7 | 0.5 | 5 | 0.1 | 6 | 0.5 | 5 |
| 1.5 | 0.1 | 7 | 0.5 | 5 | 0.5 | 3 | 0.5 | 5 |
| 2 | 0.1 | 7 | 0.5 | 5 | 0.9 | 2 | 0.5 | 5 |
| 4 | 0.1 | 7 | 0.5 | 5 | 1.7 | 0 | 0.5 | 5 |
| ≥ 10 | 0.1 | 7 | 0.5 | 5 | 1.7 | 0 | 0.5 | 5 |