检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]青岛科技大学机电工程学院,山东青岛266042
出 处:《青岛科技大学学报(自然科学版)》2003年第6期534-536,共3页Journal of Qingdao University of Science and Technology:Natural Science Edition
摘 要:在螺栓联接的强度计算中 ,绝大多数情况为密封螺栓强度计算 ,此时 ,预紧力和工作载荷对螺栓产生的皆为拉力。在工程应用中 ,存在一种紧固件螺栓 ,工作载荷的作用使螺栓产生压缩 ,整个螺栓最终合力和综合变形都不同于常规密封螺栓。螺栓的最终变形量δ∑ 为预紧变形量δL 减去工作载荷作用下螺栓伸长减少量△δ。而被联接件由原来的预紧压缩量δF 增加△δ,对应变形量的受力计算也相应发生变化。当工作载荷为交变载荷时 ,螺栓在这一压缩交变载荷作用下 ,同样存在疲劳断裂问题。本文就此进行了对比论证和实例计算。In the strength calculation of joint bolts,most case is the strength calculation of sealing bolts which will generate tensile by the action of prestressed force and work load.In engineering,there is a kind of fastening bolts that will generate compressive deformation by the action of work load.Its resultant force and compressive deformation is different with the normal sealing bolts.The final deformation δ ∑ of fastening bolts is equal to the value that the prestressed deformation δ L minus the decreasing valueΔδ of bolt stretching deformation that is caused by work load.The prestressed compressive deformation δ F of the bolted comporents increaseΔδ.So the deformation calculation method is different to normal case accordingly.When the work load is alternating load,the bolts also exist fatigue fracture problem by the action of this load.In this paper,the aforementioned problem is discussed and calculated through contrast analysis and example.
关 键 词:螺栓联结 外压力 预紧力 工作载荷 紧固件螺栓 疲劳强度
分 类 号:TH131.3[机械工程—机械制造及自动化] TH123.4
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.15