Investigation on Ultimate Strength of Steel Structural Support used in a Semi-submersible Drilling Platform
半潜式钻井平台管道钢构支架极限强度研究

Structural support is one of main type of pipe supports used in semi-submersible drilling platform. Ultimate strength of structural support is the most important factor for normally working of pipe system. Three methods, including theoretical analysis, finite element analysis and experimental analysis were used for analysis the limit load of structural supports. First, mechanical models were established and theoretical limit loads of four structural supports (cantilever support and portal support both for angle steel and H steel) were calculated out by static method. Four finite element models were built by using the software of MSC.Patran. Load-displacement curve was figured out and the limit load was determined by four criterions. At last, Experimental of limit load was carried out. The comparison between experimental results and numerical results by different finite element models were also discussed. Results show that the theoretical analysis is usually used for simple structures and the precision of method is affected by mechanical model. The reasonable finite element model such as structural model, load and boundary condition are key factors for numerical simulation.