,1156 北京科技大学学报 2006年第12期 vanced information infrastructure for integrating manufacuring [10]赵雯，王维平，朱一凡，等.协同虚拟样机技术研究.系统 resources and activities.CIRP Ann.1997.46(1):110 仿真学报，2001(1)：128 Lateral movement of lifting strings connected by screwed joints and spherical joints in deep sea by finite element analysis and virtual prototype technology FENG Fuzhang,FENG Yali,ZHANG Wenming Civil and Environmental Engineering School,University of Science and Technology Beijing.Beijing 100083.China ABSTRACI To study the lateral movement of pipe strings connected by screwed joints and spherical joints in deep sea,this paper built the models of the pipe strings and made comparison of their horizontal displace- ments.Under the four-level oceanic condition,the transiently dynamic and kinetic analyses of the pipe strings were carried out by finite element method and virtual prototype technology.The results show that the maximum lateral displacement of pipe strings connected by screwed joints is 2.1m,and the maximum moment in this system is 8400 N'm.While the maximum lateral displacement of pipe strings connected by spherical joints is 6.0m,the moment in this system is zero,and the pipe strings can be considered as flexi- ble pipes which can bear large axial force.Since the lateral movement of buffer periodically changes with time and its period is much longer than that of the waves,materials with better wearability are more suit- able for spherical joint-connected pipe strings. KEY WORDS ocean mining:pipe strings;spherical joint;screwed joint;hydrodynamic force;lateral dis- placementvanced information infrastructure for integrating manufacuring resources and activities．CIRP Ann‚1997‚46（1）：110 ［10］ 赵雯‚王维平‚朱一凡‚等．协同虚拟样机技术研究．系统 仿真学报‚2001（1）：128 Lateral movement of lifting strings connected by screwed joints and spherical joints in deep sea by finite element analysis and virtual prototype technology FENG Fuz hang‚FENG Y ali‚ZHA NG Wenming Civil and Environmental Engineering School‚University of Science and Technology Beijing‚Beijing100083‚China ABSTRACT To study the lateral movement of pipe strings connected by screwed joints and spherical joints in deep sea‚this paper built the models of the pipe strings and made comparison of their horizontal displace￾ments．Under the four-level oceanic condition‚the transiently dynamic and kinetic analyses of the pipe strings were carried out by finite element method and virtual prototype technology．The results show that the maximum lateral displacement of pipe strings connected by screwed joints is2∙1m‚and the maximum moment in this system is8400N·m．While the maximum lateral displacement of pipe strings connected by spherical joints is6∙0m‚the moment in this system is zero‚and the pipe strings can be considered as flexi￾ble pipes which can bear large axial force．Since the lateral movement of buffer periodically changes with time and its period is much longer than that of the waves‚materials with better wearability are more suit￾able for spherical joint-connected pipe strings． KEY WORDS ocean mining；pipe strings；spherical joint；screwed joint；hydrodynamic force；lateral dis￾placement ·1156· 北 京 科 技 大 学 学 报 2006年第12期