BV launches elastic shaft alignment notation

摘要

Bureau veritas has introduced a new set of requirements for shaft alignment on high powered ships. The Elastic Shaft Alignment (ESA) notation will help ensure the integrity of the structure and shaft bearings on very large vessels. Jean-Francois Segretain, deputy technical director, Bureau Veritas, says, "As ships grow in size and we seek more fuel economies we are now seeing vessels with shafts handling over 20MW of power driving large diameter propellers of over 30t weight.