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
Abstract
A 1:24 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 block/tag 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 30, 1998
- Accession Number
- ADA355687
Entities
People
- Chris Vandette
- Johnathan Nichols
- Michael D Todd
- Sandeep Vohra
Organizations
- United States Naval Research Laboratory