OS-C501
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Offshore Standard DNV-<strong>OS</strong>-<strong>C501</strong>, November 2013<br />
Sec.13 Definitions, abbreviations & figures – Page 178<br />
Table 13-1 Terms (Continued)<br />
Open beam<br />
a sandwich beam is defined as an open beam if it has face material on 2 sides only<br />
Operator<br />
the party, which assumes ultimate responsibility for the operation and maintenance of the<br />
System. The Operator may or may not be the same as the Principal or Principal’s agent<br />
Orthotropic<br />
having three mutually perpendicular planes of material symmetry.<br />
Owner<br />
person who is understood to be the operative owner of the System (same as client?)<br />
Part<br />
a component can be divided into parts<br />
Partial Factor<br />
partial factors are assigned to basic variables in order to take into account their inherent<br />
uncertainties or systematic errors.<br />
Phase<br />
well-defined period within the lifespan of a structure.<br />
Ply<br />
basic building block of a laminate with orthotropic properties. Layer of reinforcement<br />
surrounded by a matrix.<br />
Principal<br />
the party, which initiates the project and ultimately pays for its design and construction.<br />
The Principal will generally specify the technical requirements. The Principal is ultimately<br />
responsible for ensuring that safety and all other issues are addressed. The Principal may<br />
also include an agent or consultant, authorised to act for the Principal.<br />
Reinforcement<br />
a strong material embedded into a matrix to improve its strength, stiffness and impact<br />
resistance.<br />
Reliability<br />
ability of a structural component or system to perform its required function without failure<br />
during a specified time interval. The reliability is expressed as a probability, sometimes<br />
denoted the probability of survival, and can be determined as the probability density<br />
integrated over the safe states in the space spanned by the governing stochastic variables.<br />
The reliability is the complement of the failure probability.<br />
Resistance factor partial safety factor by which the characteristic strength is divided to obtain the design<br />
strength, in other literature often termed as Material Factor.<br />
Resistance<br />
capability of a structure or part of a structure, to resist load effects.<br />
Risk<br />
the quantified probability of a defined failure mode multiplied by its quantified<br />
consequence.<br />
Roving<br />
a number of strands, tows, or ends collected into a parallel bundle with little or no twist.<br />
Sandwich Structure a structural sandwich is a special form of a laminated composite comprising of a<br />
combination of different materials that are bonded to each other so as to utilise the<br />
properties of each separate component to the structural advantage of the whole assembly.<br />
Strand<br />
normally a untwisted bundle or assembly of continuous filaments used as a unit, including<br />
slivers. twos, ends, yarn and so forth, Sometimes a single filament is called a strand.<br />
Structure<br />
general word for system, component, or detail, i.e. when the distinction of size and location<br />
is not important.<br />
Stacking sequence a description of the orientation of plies in a laminate.<br />
System<br />
an assembly consisting of a range of components, connections, attachments, etc.<br />
Warp<br />
the direction along which yarn is orientated longitudinally in a fabric and perpendicularly<br />
to the fill yarn.<br />
Weft<br />
the transversal threads of fibres in a woven fabric running perpendicular to the warp.<br />
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