Please note - Registration will close on Wednesday, March 24, 2021. A link to join the webinar will be emailed to you on Thursday, March 25, 2021.
The Ship Hull Characteristics Program (SHCP) has a long history, is still the mainstay of USN stability calculations, and has a promising future in the naval architecture community. The presentation covers the origins and development history of the program with rational for the geometry modeling approach chosen for surfaces and compartments. While SHCP provides support for typical naval architecture calculations – hydrostatics, floodable length, longitudinal strength and intact & damaged stability – its primary use is for the extensive stability calculations required to establish stability safe operating envelopes and limiting displacements. SHCP’s evolving capabilities led to is incorporation as geometry engine for the USN shipboard based Flooding Casualty Control Software (FCCS), a joint project with the USCG. FCCS provides the Fleet with real time and projected loading intact and damaged stability analysis capabilities. While traditional use of SHCP for stability is to calculate end-state equilibrium conditions, the Navy acknowledged that ship stability may lead to loss during intermediate stages of flooding. This led to the development of the Advanced Stability Algorithms (ASA) programs which use enhanced SHCP geometry to perform time-domain based progressive flooding to calculate stability at every timestep. This supports the USN LFT&E requirements for survivability and recoverability assessments. The Navy is currently developing an enclosed mesh-based surface and compartment geometry which will power the ‘next’ version of SHCP. There are also considerations for a geometry upgrade to the existing version of SHCP and the inclusion of a tilt axis stability calculation module.
SPEAKER
John Rosborough
John Rosborough has 45 years of experience working in support of the US Navy. He has worked at NAVSEA, the Philadelphia Naval Shipyard, and NSWC Carderock Division where he was Branch Head for Stability & Weight Control Branch from 2001 to 2017. While employed by the Navy, he worked on new designs and in-service ship stability for amphibious ships, combatants, SWATHs, and aircraft carriers. Since 1977 he has been maintaining and improving the Ship Hull Characteristics Program (SHCP), creating pre and post processing software for stability model visualization and results analysis. This includes the software development oversight of the Flooding Casualty Control Software (FCCS), a joint USN & USCG effort, and the Advanced Stability Algorithms (ASA), a time-based progressive flooding software.
Today he provides development of ASA flooding models for USN LFT&E survivability & recoverability programs, develops support software for SHCP, FCCS and ASA model and analysis use, and associated help desk support to the stability community at large via JM Rosborough Stability Consulting, LLC. John holds a BS in Naval Architecture and Marine Engineering from the University of Michigan.