Orca Icebreaker Hull Assitant SOW 07-MAY-20.docx

Statement of Work for Development of Orca3D Hull Assistant for Icebreaker Parametric Design (07 May, 2020)

Introduction

1.1 Background – The US Coast Guard is involved in early stage design trade space and requirements investigations related to icebreaker design. Support is required to develop tools for use in an icebreaker design synthesis model for efficient trade space analysis and requirements development.

1.2 The objective of this effort is to develop a tool capable of generating icebreaker hull forms from geometric inputs that can be used to create these uniquely-shaped hull forms quickly and efficiently. Additional tools and/or scripts to automate hull form creation, the measurement of hull form parameters, and various hull form performance analyses are also needed to allow USCG personnel the ability to populate a trade space with many feasible and effective hull forms to inform the decision making process.

References

1. ABS SVR Part 6, Chapter 1, “Strengthening for Navigation in Ice”

2. NAVSEA Technical Publication T9070-AF-DPC-010/079-1, Chapter 8, “Intact and Damage Stability”

Task Statements The effort shall be performed according to the following task statements.

3.1 Task 1 – Develop Orca3D Hull Assistant for Icebreaker Hull Forms The Contractor shall develop a hull assistant tool in Orca3D that creates icebreaker hull forms. The tool shall have similar functionality to the hull assistants currently included with Orca3D. The tool shall include the control variables necessary to create and shape the hull form into typical icebreaker geometry.

The USCG will provide the Contractor with example hull forms that feature typical icebreaker geometries and the various icebreaker hull features described below.

In addition to the control variables, the tool shall have options for the following:

· Propulsion Arrangement. The tool shall provide the user with the option to choose a propulsion arrangement. The options shall include shafts, stern azipods, a bow azipod, or a combination of shafts and bow/stern azipods. The tool shall automatically generate bow and/or stern geometry that is shaped to accommodate the chosen propulsion arrangement.

· Buoy/Working Deck. The tool shall provide the user with the option to include a buoy or working deck. If selected, the tool shall provide the user with the ability to specify the deck size and location (forward or aft of deckhouse).

· Ice Stop (Forefoot). The tool shall provide the user with the ability to include, shape, and locate an ice stop.

· Ice Chine or Knuckle Placement. The tool shall provide the user with the ability to include and place ice chines on the hull. Ice chines are knuckles above and below the waterline where the flare angle changes.

Developing a single NURBS surface topology that will accommodate localized details for all these configurations is not required. Recognizing this, together with the initial intended use of the hull assistant tool as a means to quickly explore the hull form design space, this task shall focus on developing a simplified surface topology capable of representing the principal features associated with the hull configurations that the USCG deems most significant (e.g., a flat area of the surface in the stern to support azipod propulsion). Geometric details such as fillets and other surface fairings where skegs join the hull, localized shaping to improve ice-breaking ability in reverse, and propeller pre-swirl appendages can be neglected for this task. The overall fairness of the hull and appendage geometry created by the tool need not be “production-ready’ but shall correctly represent the total buoyancy and center of buoyancy of the design as would be required for early-stage design studies. Additional detail and fidelity can be added to the hull assistant geometry in later phases of the program.

3.2 Task 2 – Develop Tool or Script to Evaluate and Calculate Hull Form Parameters The Contractor shall develop a tool or script to automate the calculation and extraction of the values of the hull form parameters specified in Appendix 1 from an Orca3D hull form. The Contractor shall provide a template script and instructions outlining how to automate the calculation of additional parameters.

3.3 Task 3 – Develop Script to Automate the Execution of Task 1 and Task 2 Deliverables The Contractor shall develop a script to automate the execution of the Icebreaker Hull Assistant developed in Task 1 and the Hull Parameters Calculations script developed in Task 2. The script shall pass all required inputs for the Icebreaker Hull Assistant developed in Task 1 to Orca3D. The script shall output all output variables calculated by the script developed in Task 2 in a CSV, XML, or similar format.

3.4 Task 4 – Develop Rhino/Orca3D Tool or Script to Create Ship Subdivisions (Optional) The Contractor shall develop a Rhino tool or script that places bulkheads and decks within the hull geometry.

The tool or script shall allow the user to input the total number of decks and the vertical location of each deck above the baseline. The tool or script shall allow the user to input the total number of transverse bulkheads and the longitudinal location of each bulkhead aft of the origin. The tool or script shall include a check that ensures all bulkheads and decks are placed within the hull geometry.

The tool or script shall measure and output the deck area and volume of each deck and longitudinal subdivision. The tool or script shall measure and output the area of each transverse bulkhead. The tool or script shall measure and output the deck area and volume of each individual compartment (i.e. space between the hull, bulkheads 1 and 2, and decks 2 and 3). Additional detail about the required output is provided in Appendix 1, “Outputs Required for Area/Volume and Compartments” section.

The Contractor shall develop a script to automate the execution of the tool or script developed from this Task. The automation script shall be developed to work with or included in the Task 3 deliverable. The automation script shall pass all required inputs to the tool or script. The automation script shall output the outputs specified above from an Orca3D hull form with decks and bulkheads in a CSV, XML, or similar format.

3.5 Task 5 – Develop Tool or Script to Perform Intact Stability Analyses in Orca3D (Optional) The Contractor shall develop a tool or script that performs an intact stability analysis in Orca3D on an Orca3D hull form. The analysis and criteria shall be in accordance with Reference 2, following the procedures for early-stage design when applicable.

The tool or script shall allow the user to select the criteria to be included in the analysis from the following options:

· Beam Winds Combined with Rolling (Reference 2, Section 8.1.3)

· The script shall provide the user with the ability to specify a roll back angle, wind velocity, wind profile (area and centroid vertical height), and angle of unrestricted downflooding.

· Crowding of Personnel to One Side (Reference 2, Section 8.1.6)

· The script shall provide the user with the ability to specify a personnel weight and angle of unrestricted downflooding. The center of gravity of the personnel shall be set to 95 percent of the ship’s maximum half breadth.

· High-Speed Turns (Reference 2, Section 8.1.7)

· The script shall provide the user with the ability to specify a turning speed, turn radius, ship vertical center of gravity, and angle of unrestricted downflooding.

· Beam Winds with Rolling and Icing (Reference 2, Section 8.1.8)

· The script shall provide the user with the ability to specify a roll back angle, wind velocity, and angle of unrestricted downflooding.

The outputs from this analysis shall be in a CSV, XML, or similar format.

The Contractor shall develop a script to automate the execution of the tool or script developed from this Task. The automation script shall be developed to work with or included in the Task 3 deliverable. The automation script shall pass all required inputs to the tool or script. The automation script shall output the results of the analysis from Orca3D.

3.6 Task 6 – Develop Tool or Script to Perform Damage Stability Analyses in Orca3D (Optional) The Contractor shall develop a tool or script that automatically performs a damage stability analysis in Orca3D on an Orca3D hull form. The analysis and criteria shall be in accordance with Reference 2, Section 8.3.1.1. The tool or script shall allow the user to select a one compartment damage analysis or a two compartment damage analysis. The analysis shall only include the flooding of major longitudinal subdivisions.

The outputs from this analysis shall be in a CSV, XML, or similar format.

The Contractor shall develop a script to automate the execution of the tool or script developed from this Task. The automation script shall be developed to work with or included in the Task 3 deliverable. The automation script shall pass all required inputs to the tool or script. The automation script shall output the results of the analysis from Orca3D.

3.7 Task 7 – Develop Script to Automate the Execution of a Speed/Power Analysis in Orca3D (Optional) The Contractor shall develop a script to automate the execution of a Holtrop speed/power analysis in Orca3D on an Orca3D hull form. The script shall provide the user with the ability to set the speed parameters, design margin, and propulsive efficiency. The analyses shall be completed for the design condition of the hull.

The script shall pass all required inputs to Orca3D. The script shall output the results of the analysis from Orca3D in a CSV, XML, or similar format.

3.8 Task 8 – Develop Script to Automate the Execution of Orca3D Marine CFD (Optional) The Contractor shall develop a script to automate the execution of Orca3D Marine CFD. The script shall pass all required inputs to Orca3D Marine CFD, including geometry and mesh files. The script shall output the outputs of the CFD run from Orca3D in a CSV, XML, or similar format.

3.9 Task 9 – Develop Reporting and Deliverables

The Contractor shall develop a final report documenting the work conducted. The Contractor shall meet with SFLC-ESD-NAME-NAV ARCH personnel at the SFLC office located in Glen Burnie, MD to present the results of this effort and demonstrate the capabilities of the tools and the application of the scripts developed per each task. The deliverables shall include a descriptive report, User Manuals or guidance, and a copy of the final version of the software. Files shall be provided on CD/DVD and delivered via email or other electronic file transfer.

3.10 Task 10 – Provide Post-Delivery Support for Training and Implementation The Contractor shall provide training to SFLC-ESD-NAME-NAV ARCH personnel on the use of all software deliverables. The training shall include a demonstration through a worked example for each task.

The Contractor shall provide post-delivery implementation support for all software deliverables.

Period of Performance Period of performance shall be 52 weeks after contract award.

Schedule and Deliverables

5.1 Kickoff Meeting – within 2 weeks of contract award and prior to award of each optional task.

5.2 Icebreaker Hull Assistant Tool – Due 15 weeks after contract award.

5.3 Tool or Script to Evaluate and Calculate Hull Form Parameters – Due 22 weeks after contract award

5.4 Script to Automate the Execution of Task 1 and Task 2 Deliverables – Due 28 weeks after contract award

5.5 Tool or Script to Create Ship Subdivisions in Orca3D (Optional) – Due 12 weeks after task award

5.6 Tool or Script to Automate the Execution of Intact Stability Analyses in Orca3D (Optional) – Due 12 weeks after task award

5.7 Tool or Script to Automate the Execution of Damage Stability Analyses in Orca3D (Optional) – Due 12 weeks after task award

5.8 Script to Automate the Execution of a Speed/Power Analysis in Orca3D (Optional) – Due 12 weeks after task award

5.9 Script to Automate the Execution of Orca3D Marine CFD (Optional) – Due 12 weeks after task award

5.10 All contract items (5.2-5.4) shall be presented and provided at a meeting with the USCG 28 weeks after contract award. Optional items shall be presented and provided at a meeting with the USCG 12 weeks after task award.

5.11 Status Reports – Due Monthly after Kick-Off Meeting

· Reports should summarize work completed since last update (last monthly report); highlight questions and concerns for USCG attention; and provide overall progress of project and remaining work.

5.12 Travel – Local travel may be required throughout the period of performance to the SFLC facility located at 707 E. Ordnance Road, Baltimore, MD. These trips may include the following: kickoff meeting, collaboration meetings (as required), and final presentation meeting and handoff of final deliverables.

Security Clearance

6.1. This work is not classified. No security clearance is required.

Contracting Officer’s Representative

7.1. The Contracting Officer’s Representative (COR) and technical point of contact at the U.S. Coast Guard Surface Forces Logistics Center will be Mr. Karl A. Stambaugh, SFLC-ESD-NAME-NAV ARCH, Phone: (410) 762-6910, e-mail: Karl.A.Stambauch@uscg.mil

7.2. The Alternate Contracting Officer’s Representative (ACOR) at the U.S. Coast Guard Surface Forces Logistics Center will be Mr. Ben Brainard, SFLC-ESD-NAME-NAV ARCH, Phone: (410) 762-6811, e-mail: Benjamin.C.Brainard@uscg.mil.

Notes

8.1 Use of Government Furnished Material – Government furnished material shall be used for the delivery order only and shall not be used or disseminated for any other purpose.

8.2 Rights in Data – The USCG shall retain Usage Rights in all data, including software, developed as part of the effort regardless of form or medium. Government furnished data are considered to be solely the property of the USCG and shall not be released without the written consent of the USCG. The Contractor shall retain Commercial Rights to all software developed under this task, excluding the Task 1 deliverable.