SIMMAN 2020
Purpose

The purpose of the workshop is the assessment of current simulation methods for ship manoeuvring to aid code development, establish best practices and guide industry. In the workshop, we benchmark the capabilities of different ship manoeuvring simulation methods including systems and CFD based methods through comparisons with results for tanker, container ship and surface combatant hull form test cases.
Calculated trajectories will be compared with free running model test data using provided PMM and CMT (circular motion mechanism/rotating-arm) data. Simulations can be made by using provided PMM and CMT (circular motion mechanism/rotating-arm) data which can be found on the ftp site. Submissions for calculated forces and moments (generated by CFD or other methods), will be compared with both PMM/CMT test data.

In addition to IMO manoeuvres in deep and shallow water, SIMMAN 2020 will also focus on manoeuvring in waves. New free running and captive model tests are currently being conducted. The captive model test data will be provided to the participants in order for them to cover manoeuvres in deep water, shallow water and waves.

The comparisons for the free running model tests will be partly blind in the sense that the free running model test data that has been re-measured after SIMMAN 2014 and the data in waves will not be provided prior to the workshop.
It is important to note that much of the model test data that was used at SIMMAN 2008 and 2014 has been replaced with new data for SIMMAN 2020. Participants must be aware of this when using the available model data for their simulations.

TABLE 1: Description of the test cases

1 2 3 4 5
KVLCC2-deep KVLCC2-shallow KCS deep KCS shallow ONRT
Calm Water Captive test (forced motion) Combinations of drift angles and rate of turn; Comparison of forces and moments
1.1.1: Static drift
1.1.2: Drift & yaw
2.1.1: Static drift
2.1.2: Drift & yaw
3.1.1: Static drift
3.1.2: Drift & yaw
4.1.1: Static drift
4.1.2: Drift & yaw
5.1.1: Static drift
5.1.2: Drift & yaw
Trajectories of self-propelled ship Manoeuvres;
Comparison of trajectories and derived characteristics
1.2.1: SP & 20°/20° ZZ PS
1.2.2: 35° TC PS
2.2.1: SP & 20°/5° ZZ PS
2.2.2: 35° TC PS
3.2.1: SP & 20°/20° ZZ PS
3.2.2: 10°/10° ZZ PS
3.2.3: 35° TC PS
3.2.4: 20°/20° ZZ SB
4.2.1: SP & 20°/5° ZZ PS
4.2.2: 35° TC PS
5.2.1: SP
5.2.2: 20°/20° ZZ PS
5.2.3: 35° TC PS
Waves Trajectories of self-propelled ship Turning circle 35 to PS Comparison of trajectories and derived characteristics
3.3.1: 35° TC SS, calm water
3.3.2: 35° TC SS, head waves
5.3.1: 35° TC PS, starting in head waves

Notes:

  • Submission of x.1.1 is a mandatory for submitting x.1.2; The same are for x.2.1 and x.2.2, x.3.1 and x.3.2, etc.
  • Before submitting 5.3.1 and 5.3.2 you have to submit 5.2.3
  • The ship speed and the model scale are different between case 3.3.1(14.5 knots) and 3.2.3(24 knots)
  • SP means self propulsion, indicating that every manoeuvr should start from self propulsion point and that the propeller RPM or thrust are validation variable (for CFD-based simulations)
  • PS means port side, and SS means starbord side.

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