Based on the analysis of the disadvantage of traditional assembly motion navigation, a new approach, which is based on collision detection and assembly force has been put forward.

The numerical analysis for the assembly stress in the local short fault of a vessel girth joint;

The main cause of fatigue origination was excessive assembly stress which was created in the course of heavy repair assembly,and the issue of missed check also existed.

The author analyses the radial displacement of the cylinder wall caused by the internal pressure in hydraulic operating cylinder by means of Lame formula, and taking a composite cylinder as a mechanical model, analyses and derives the assembling stress caused by the shrink range between the cylinder and the beam hole.

Design and application of assembling pressure

The factors (such as grid alloy, AGM separator, the design of the thickness of battery plate, the assembling pressure, the charging regime and the discharging current) of affecting deep cycle life of valve regulated lead acid VRLA battery were discussed.

The effects of time,temperature and welding line on press fitting should be comprehensively considered to ensure certain transmitted torque to an assembling part.

Disscution on the assembly pressure of VRLA battery

The assembly pressure of circular tubes with different lengths was calculated with finite element method,the diagram of assembly pressure was drawn,and the variation of assembly pressure of structure for different parameters was studied.