Research On Deformation Control Of 174000m~3 LNG Ship Cargo Machinery Room And Electric Motor Room Under Multiple Working Conditions

As a typical box-shaped thin plate structure,the LNG ship cargo machinery room and electric motor room are prone to deformation under multiple working conditions due to the characteristics of thin plate and hollow.These deformation problems often require mechanical assembly or pyrotechnics correction,or even plate replacement to solve,which costs a lot of construction costs and construction cycle.Taking the newly designed 174000m~3 LNG ship cargo machinery room and electric motor room as the object for example to study.This paper analyzes the construction processes of the cargo machinery room block(DH22S),the electric motor room block(DH21S),the pre-erection block(DZ21S)and the cargo machinery room unit,finds out four key working conditions for further study.By means of finite element analysis,three main parts of the technological scheme(the layout scheme of the supporters,the layout scheme of the temporary reinforcement and the layout scheme of the lifting rings)of the box-shaped thin plate structure are studied and optimized in detail.The relationships between the layout schemes and the deformation of thin plate structures are concluded.Finally,the key matters in design of lifting technology scheme of frame structure are explored through the study of mechanical room unit.