How-Tos & Demonstrations
Rhino NACA Macro : Use & Underlying Assumptions – 08-Apr-2020
This report documents the use and underlying assumptions built into the Rhino_NACA_Macro. The Rhino macro works in conjunction with the NACA_Sections.xlsx spreadsheet. Using the defined NACA section traces the macro can be used to create a rudder, stabilizer, or dihedral shape from which CSV points are generated. These CSV points are extracted and converted to SHCP offset data via the Shrink program.
Rhino ‘Wedding Cake’ Superstructure Macro : Use & Underlying Assumptions -16-Apr-2020
This report documents the use and underlying assumptions built into the Rhino_WCSuperstructure_Macro. The Rhino macro works in conjunction with the WC_SS_Contours.xlsx spreadsheet. Using the defined deck level superstructure geometry, the macro can be used to create station based Rhino Contours from which CSV points are generated. These CSV points are extracted and converted to SHCP offset data via the Shrink program.
News
Navy Announces Findings On Sinking of World War I Cruiser USS San Diego
December 11, 2018
JM Rosborough Stability Consulting was one of the participants in this effort where “teams used historical analysis, archaeological research, site investigation, and impact and flood modeling to eliminate other possibilities that might have caused San Diego’s sinking such as sabotage, accident, or enemy torpedo.”
Supporting the NSWCCD team we helped assemble and exercise the Flooding Model Advanced Stability Algorithms (FLMASA) software model which helped discover and validate the progressive flooding that led to the ships capsize within 25 minutes.
Publications
- SHCP Elements: Database Development Best Practice, Revised 22 April 2024
This Element defines various ways to effectively construct an SHCP model sufficient to produce accurate hydrostatic and stability-based calculations. - SHCP Elements: Compartment Modeling, Revised 07 July 2021
This Element describes common approaches for modeling SHCP both simple and complex compartments including internal and external offset reference and sheer deck implementation. - SHCP Elements: Offsets DownSlope Modeling, 23 November 2019
This Element describes common methods for modeling SHCP offsets that have a downslope segment on the offset cross-section. - DPC 079-1 (T9070-AF-DPC-010-079-1), 19 January 2016
This is the most current version of the “Design Data Sheet (DDS) 079-1” now referred to as “Design Practices and Criteria for U.S. Navy Surface Ship Stability and Reserve Buoyancy”. I am the primary author of this document. - Intake and Exhaust Duct Modeling – SHCP Modeling Approaches and Considerations, 30-July 2019
The DPC 079-1 requires that such ducting be modeled to affect the intrusion of flooding water into the ducting as a part of both hydrostatic and righting arm calculations. This paper discusses three approaches: the use of 1) line volumes, 2) compartment spaces and 3) compartment spaces combined with offset surfaces. The strengths and weaknesses of each approach is outlined.
Published Articles
– “Flooding Casualty Control Software: Helping Ship Crews Decide When to Stay and When to Go“, SEA FRAME 2008, Volume 4, Issue 3
Published Reports
- NSWCCD-20-TR-2006/21,”Ex- PETERSON (DD 969) Time Domain Progressive Flooding Simulation using Advanced Stability Algorithms Program”, J. Rosborough, June 2006
- T9070-AF-DPC-010/079-1, “Design Practices and Criteria for U.S. Navy Surface Ship Stability and Reserve Buoyancy”, 19 Jan 2016
- NSWCCD-80-TR-2016/031, “ASA MODEL CREATION FOR THE LCS-3”, J. Rosborough, Nov 2016
- NSWCCD-80-TR-2019/002, “Advanced Stability Algorithms Model Initialization Verification”, Terwilliger, K., Rosborough, J. , Jan 2019
- NSWCCD-80-TR-2019/003, “Advanced Stability Algorithms (ASA) Model Creation for the USS CORONADO (LCS 4)”, Terwilliger,K., J. Rosborough, Jan 2019
- NSWCCD-80-TR-2019/004, “Ex-ORISKANY (CVA-34) Advanced Stability Algorithms Validation”, Terwilliger, K., Rosborough, J., Jan 2019
- NSWCCD-80-TR-2019/005 “Flooding Model Advanced Stability Algorithms (FLMASA) Acceptability for a Stabilized Monohull”, Terwilliger,K., Rosborough, J., Jan 2019
Point Papers & Best Practices
- “Proposed Flooding Extents for Damage Stability Evaluation of Ships During Overhaul, When Towed, When Decommissioned”, J. Rosborough, 24-Nov-2014
- “Stability Best Practices – SHCP Modeling of Compartments & Subdivision Use for Traditional and Lesser Flooding”, J. Rosborough, 08-Oct-2015
- “Approach to Rationally Determine Lesser Extents of Flooding”, J. Rosborough, 29-Dec-2015
- “Calculation of an Allowable KG (KGa) Limit for Mission Operability Based on Counter Trimming and Counter Listing Limits”, J. Rosborough 29-Dec-2016
- “Process Description for Software Design for Evaluation of Ships with After Damage List and Trim Limits”, J. Rosborough, 29-Dec-2016
- “A Discussion of USN Stability Status”, J. Rosborough, 05-Jan-2016
- “Applicability of Advanced Stability Algorithms (ASA) Software to USS INDEPENDENCE Design Hull Form”, J. Rosborough, 01-Jun-2017
- “Advanced Stability Algorithms lntended Use”, J. Rosborough, 15-Nov-2017
- “Acceptance Criteria for FLMNet Predictions of Progressive Flooding, Stability, and Equipment Submergence”, J. Rosborough, 13-Apr-2018
