NSV

Gibbs & Cox, Inc. is a recognized leader in the fields of noise, shock and vibration engineering for shipboard applications. Our expertise in the design and engineering of ships and ship systems installations to withstand the rigors of near-miss underwater explosions is unparalleled. Some noise, shock and vibration tasks typically performed by Gibbs & Cox, Inc. include:

Airborne noise predictions Ship radiated noise predictions Resilient mount specification and application engineering Noise requirements and specifications development Application of advanced isolation techniques

Dynamic Design Analysis Method (DDAM) Shock Analysis Transient Shock Analysis Shock trial grooming inspections Test procedure development Test and trials planning and support Post-test inspection, documentation and analysis Shafting, equipment and hull girder vibration analysis

Gibbs & Cox, Inc. engineers, designers and technicians have supported every US Navy surface ship shock trial, beginning with FFG 7 and most recently DDG 81. This support has ranged from pre-trial grooming inspections of every ship, to identify potential construction or installation deficiencies for correction before the test; to In addition, Gibbs & Cox, Inc. has worked collaboratively with the US Navy to develop appropriate design and installation guidelines for ships and ship systems based on the lessons learned during these full ship trials. In addition to ship trials, Gibbs & Cox, Inc. has supported equipment noise, shock and vibration testing and analysis for the following programs:

Recent Noise, Shock and Vibration Related Projects include the following:

• Littoral Combat Ship - As part of the Lockheed Martin LCS Team, Gibbs & Cox, Inc. developed the Shock Hardening Plan included in the Integrated Survivability Report, and is further developing these contract deliverables during Final System Design.
• LPD 17 class - Gibbs & Cox, Inc. is a member of the Total Ship Hardening Team, providing direct support to NAVSEA and PEO Ships in shock and survivability engineering and design.
• DDG 51 class - In addition to developing the detail design of the noise, shock and vibration mitigation features of the DDG 51 class, Gibbs & Cox, Inc. continues to support PEO-Ships in the areas of shock and survivability for the class. This has included significant roles in the planning and execution of the full ship shock trials of both DDG 53 and DDG 81.
• LHD 8 - Gibbs & Cox, Inc. has supported NSWCCD-SSES in the planning and analysis of shock test results from major equipment tests, including the ship service diesel generators and the auxiliary propulsion system. In addition, Gibbs & Cox, Inc. performed an independent assessment of the longitudinal vibration of the LHD 8 propulsion system
• JCC(X) - Gibbs & Cox, Inc., as part of the Early Industry Involvement, was tasked by PEO Ships to prepare a shock and survivability tradeoff study, to assess the relative merits of hard-kill vs. soft-kill defenses, signature management and damage tolerant design features and develop recommended language to be included in the ship performance specification

Gibbs & Cox, Inc. utilizes an extensive suite of software to design, engineer and analyze noise, shock and vibration of ship structure and equipment. Our Software suite includes:

Shock Analysis	DDAM	Dynamic Design Analysis Method
FEA	NE-NASTRAN®	Finite Element Analysis Program
FEA	FEMAP®	Finite Element Analysis Modeler
Airborne Noise Analysis	CADDB	Program developed for US Navy
Airborne Noise Analysis	CONVERTMRG	Program developed for US Navy
Radiated Noise Prediction	PRDCT	Gibbs & Cox, Inc. Proprietary program
Resilient Mount Sizing	MNT-12	Gibbs & Cox, Inc. Proprietary program
Resilient Mount Sizing	RES-MOUNT	Gibbs & Cox, Inc. Proprietary program
Longitudinal Shaft Vibration	LONGVIB	Gibbs & Cox, Inc. Proprietary program
Torsional Shaft Vibration	TORVIB	Gibbs & Cox, Inc. Proprietary program
Transverse Shaft Vibration	TRANSVIB	Gibbs & Cox, Inc. Proprietary program