平面式船台横移区和纵向弧形滑道

船厂技术改造对造船工业的建设和发展起着关键性的作用。只有进行技术改造才能不断地提高产品质量,缩短建造周期和降低成本,提高产品的竞争能力。内河小型船厂与大型船厂相比具有造船数量多、品种多、尺度变化大,周期短、船舶移位、下水频繁等特点。为适应生产要求,必须有一套理想的船舶移位、下水设施,完成从船体建造→除锈油漆→舾装→下水的过程,并能形成多品种、小批量的生产流水线。

嘴东工业区修造船厂滑道尺度设计

介绍嘴东工业区修造船厂供船舶上墩下水的滑道主要尺度的设计,此船厂位于唐山市滦南县双龙河出海口处,拉船工艺设计采用自摇式船台滑道,主要修造5000吨级以下的船舶。

Limits to foundation displacement of an extra high voltage transmission tower in a mining subsidence area

Given the background of a transmission tower erected on a particular mining subsidence area,we used finite element modeling to analyze the anti-deformation performance of transmission towers under a number of different load conditions,including horizontal foundation displacement,uneven vertical downward displacement,wind loads and icing conditions.The results show that the failure in stability of a single steel angle iron represents the limit of the tower given ground deformation.We calculated the corresponding limits of foundation displacements.The results indicate that compression displacement of the foundation is more dangerous than tension displacement.Under complex foundation displacement conditions,horizontal foundation displacement is a key factor leading to failure in the stability of towers.Under conditions of compression or tension displacement of the foundation,wind load becomes the key factor.Towers do not fail when foundation displacements are smaller than 1% (under tension) or 0.5% (under horizontal compression or single foundation subsidence) of the distance between two supports.

抡大锤的厂长——记威海市渔轮厂厂长吕廷健

威海渔轮厂原来是威海市环翠区水产局所属的一个小修造厂。吃大锅饭的那些年,这个小厂设备陈旧,管理混乱,人心涣散。最好的年景,年利润还不足千元。新一轮改革浪潮涌起了,小小修造厂终于被大潮冲涌着,加入了改革大潮。搞水产的,哪能缺了船昵?水产局准备加强这个小厂。吕廷健同志是1987年走马上任担任渔轮厂厂长的。面对一个破烂不堪的摊子,工人出身的吕廷健没有什么鼓动性的言辞,也没有新官上任三把火的喧闹。他穿上工作服,带上安全帽。