SNAME Ad Hoc Panel #6
Structural Design and Response in Collision and Grounding
Last revised: August 14, 2002 (Posted Draft SSC-1400 Collision Report)
Previous
revisions:
August 10, 2000
(posted SNAME2000 paper under Panel Activities)
January 24, 2000 (Added
conclusions from January 14, 2000 panel meeting)
Javuary 7, 2000 (Announced Jan 14,
2000 panel meeting and provided agenda)
October 25, 1999 (major revision
to working group plans based on update and feedback at SNAME Annual Meeting 99;
see in particular WG1 - Collision and WG 3 revisions)
March 10, 1999 (New inputs from
WG1, WG3 and WG4)
January 21, 1999 (links, WG pages,
misc., Annual Meeting decisions)
October 29 and 30, 1998 (links, WG
pages, WG 2 Leader, misc.)
Sept 7, 1998 (links & WG
pages), June 16, 1998 (sub-group members)
June 10, 1998 (meetings &
sub-groups)
May 19, 1998 (Created)
New
Charter_and_Objectives
Organization and Master Plan
Membership
Additional Information and Related Links
Panel Activities
Deliverables
Master Schedule of Meetings and Events (Panel and WGs)
New
The plan and current status of the panel's work are reported on the Panel Activities page, and on individual panel working-group pages (WG1, WG2, WG3, WG4).
SSC-1400 Draft Collision Report is available for review and comment.
Charter and Objectives
On May 14, Ad Hoc Panel #6, Structural Design and Response in Collision and Grounding, was formed under the SNAME T&R Steering Committee with support from the Hull Structure Committee, Ship Design Committee and Marine Safety and Environmental Protection Panel (O-44).
The objectives of the panel are:
Investigate, compare and assess tools for predicting grounding and collision damage (including collision with ice). Emphasize simplified methods, which can be readily applied to the design and rapid analysis of new structural concepts, including applications using probabilistic scenarios. Finite element and other more rigorous methods may be considered and used to validate simplified methods. Include comparisons to available data.
Propose a format for a collision and grounding database. The database may include actual, experimental and simulated data as long as it is properly identified. Gather initial data.
Define standard scenarios and conditions for grounding and collision analyses. This may include probabilistic and/or deterministic descriptions of ship speed, trim, collision angle, striking ship displacement, striking ship bow characteristics, impact point, bottom, rock characteristics, rock height above baseline, sea state, ice mass, etc.
Define standard criteria and methodologies for applying structural performance in grounding and collision including oil outflow, carriage of nuclear waste, damaged stability, ultimate strength and serviceability. Provide basis for performance specifications in these areas.
As tools, standard scenarios, methodologies and performance criteria are evaluated and defined, apply them to a matrix of typical and innovative structural designs and concepts. Identify promising concepts for future study.
Organization and Master Plan (also see WG plans)
The panel is organized into four working-groups:
- Tools (WG1) - Assessment of Collision and Grounding Analysis Tools.
- Databases (WG2) - SNAME Collision and Grounding Databases. - Combined with WG1 on January 14, 2000.
- Scenarios (WG3) - Scenarios, Application Methodologies and Performance Standards in Collision and Grounding.
- Concepts (WG4) - Design Concept Assessment in Collision and Grounding.
Figure 1. Panel Organization
Each WG has its own objectives, activities, and Plan (WG1,WG2, WG3, and WG4). They interface and support each other as shown in Figure 1.
The Tools WG will act as the integrator and test bed for products from the other WGs:
- Data from WG2 will be used by WG1 to assess and validate grounding and collision models and sub-models. WG1 will recommend data types and data format to WG2 necessary to support model validation.
- Scenarios from WG3 will be calibrated and used by WG1 in the grounding and collision models. WG1 will recommend scenario inputs required for damage prediction.
- Designs developed by WG4 will be assessed by WG1. WG1 and WG4 will work together to identify important design parameters to be included in the damage models.
Material compiled by workgroup members will be posted on the workgroup web pages for comment and question throughout the work of the panel.
Work will follow an iterative process:
- WG leader - post material for other members to review and discuss.
- WG members - provide comment, critique, alternative approaches, supporting or conflicting data, etc.
- WG leader - integrate feedback, model, assess, post feedback
This is the model and plan for all the work of this panel and panel WGs.
Membership
The members of the ad hoc panel are listed on the Membership page.
Interested SNAME members should contact the Panel Chair, Alan Brown, brown@aoe.vt.edu.
Additional Information and Related Links
The Ad Hoc Panel on the Environmental Performance of Tankers was formed in May 1995 and has documented its work in a paper titled "A Framework for Assessing the Environmental Performance of Tankers in Accidental Groundings and Collisions" (in pdf format), that was presented at the Annual Meeting in Ottawa on October 17, 1997. This paper represents the summary final report of the work of this panel.