Contact nonlinear theory was researched. Contact problem was transformed into optimization problem containing Lagrange multiplier, and unsymmetrical stiffness matrix was transformed into symmetrical stiffness matrix. ...Contact nonlinear theory was researched. Contact problem was transformed into optimization problem containing Lagrange multiplier, and unsymmetrical stiffness matrix was transformed into symmetrical stiffness matrix. A finite element analysis （FEA） model defining more than 300 contact pairs for long nut-short screw locking mechanism of a large-scale vertical gear-rack typed ship-lift was built. Using augmented Lagrange method and symmetry algorithm of contact element stiffness, the FEA model was analyzed, and the contact stress of contact interfaces and the von Mises stress of key parts were obtained. The results show that the design of the locking mechanism meets the requirement of engineering, and this method is effective for solving large stole nonlinear contact pairs.展开更多
根据三峡升船机船厢、上下闸首等设备设施的实际布置和结构特点,针对不同类型的典型船型,研究牵引距离、牵引角度、牵引力等技术指标,提出轨道小车和电动推轮牵引两种三峡升船机船舶进出船厢牵引方案,论证方案的可行性,并结合升船机现...根据三峡升船机船厢、上下闸首等设备设施的实际布置和结构特点,针对不同类型的典型船型,研究牵引距离、牵引角度、牵引力等技术指标,提出轨道小车和电动推轮牵引两种三峡升船机船舶进出船厢牵引方案,论证方案的可行性,并结合升船机现阶段通航运行时间和牵引预期耗时对方案进行比选,得出预期全年日均通航时间由47 min 59 s缩短至43 min 47 s,较现行船舶通航效率有所提升,为后续的船舶牵引工程实现提供理论支撑。展开更多
基金Supported by the Key Research Project of StatePower Corporation (SPKJ 0l6-06)the Key Scientific ResearchProject of Hubei Province ( 2004AC101D31)
文摘Contact nonlinear theory was researched. Contact problem was transformed into optimization problem containing Lagrange multiplier, and unsymmetrical stiffness matrix was transformed into symmetrical stiffness matrix. A finite element analysis （FEA） model defining more than 300 contact pairs for long nut-short screw locking mechanism of a large-scale vertical gear-rack typed ship-lift was built. Using augmented Lagrange method and symmetry algorithm of contact element stiffness, the FEA model was analyzed, and the contact stress of contact interfaces and the von Mises stress of key parts were obtained. The results show that the design of the locking mechanism meets the requirement of engineering, and this method is effective for solving large stole nonlinear contact pairs.
文摘根据三峡升船机船厢、上下闸首等设备设施的实际布置和结构特点,针对不同类型的典型船型,研究牵引距离、牵引角度、牵引力等技术指标,提出轨道小车和电动推轮牵引两种三峡升船机船舶进出船厢牵引方案,论证方案的可行性,并结合升船机现阶段通航运行时间和牵引预期耗时对方案进行比选,得出预期全年日均通航时间由47 min 59 s缩短至43 min 47 s,较现行船舶通航效率有所提升,为后续的船舶牵引工程实现提供理论支撑。
