Accession Number:

ADA355687

Title:

Analysis of Pendulated Load Response and T-ACS/Lighter Interaction in a 1:24 Scale Model JLOTS Cargo Transfer Operation at the David Taylor Model Basin in 1997

Descriptive Note:

Memo rept.

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC FIBEROPTICS SMART STRUCTURES SECTION

Personal Author(s):

• Todd, Michael
• Vohra, Sandeep
• Vandette, Chris
• Nichols, Johnathan

Report Date:

1998-10-30

Pagination or Media Count:

36.0

Abstract:

A 124 scale model test of a Joint-Logistics-Over-The-Shore JLOTS at-sea cargo transfer operation was conducted at the David Taylor Model Basin NSWC-Carderock in July and August of 1997. The test specifically consisted of a container ship, T-ACS class crane ship with motorized model crane, and lighterage, all subject to various sea states, crane configurations, ship headings, implementation of rider blocktag line RBTS control, and load types 20 foot container and VLS missile cannister. Forty-six channels of information were gathered for each run, which typically lasted about 8 minutes. For certain conditions, load pendulation is reported, and an analysis of the nonlinear aspects of these oscillations yields dual-time scale behavior, which may be chaotic in certain conditions. In addition. impacts between T-ACS and lighter barges were noted during the tests, and a preliminary analysis of this phenomenon is included.

Descriptors:

• *NAVAL OPERATIONS
• *CARGO HANDLING
• SCALE MODELS
• MODEL TESTS
• NAVAL LOGISTICS
• CRANES
• SEA STATES
• CONTAINERSHIPS
• PENDULUMS

Subject Categories:

• Marine Engineering
• Logistics, Military Facilities and Supplies
• Naval Surface Warfare

Distribution Statement:

APPROVED FOR PUBLIC RELEASE