公英制不同大小螺纹牙型角对螺栓组受力的影响
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摘要
螺栓组连接中,针对公制(美制)和英制所规定的螺纹连接中牙型角的不同,在只受轴向载荷作用且其他条件均相同的情况下,分别对作用于螺纹牙上载荷的大小和分布情况通过Matlab进行计算仿真分析。结果表明:公制60°螺纹牙型角在受力强度及载荷分布均匀性方面都是优于英制55°螺纹牙型角的。且在螺栓连接旋合区段内的受力分析中显示,所施加载荷的近40%的力承受在前几圈螺纹上,以及在沿着旋合方向上所受载荷逐渐呈递减的梯度分布规律。这与我国现代化工业生产中大多采用公制螺纹标准相吻合。
In bolt connection,according to metric and imperial systems,the tooth type angles are different.The only axial loading and other conditions are in the same situation respectively to the effect of load on the thread size and distribution calculated by matlab simulation analysis. The results show that the metric60 ° type of thread angle on the stress intensity and load distribution uniformity is superior to the imperial55 ° type of thread Angle. And in the stress analysis of bolt connection screw or segment,nearly 40% of the applied load by force to bear on a few laps before thread. And along the spiral and direction of gradient distribution by load will decrease gradually. This is in line with China's modern industrial production using metric thread standards.
In bolt connection,according to metric and imperial systems,the tooth type angles are different.The only axial loading and other conditions are in the same situation respectively to the effect of load on the thread size and distribution calculated by matlab simulation analysis. The results show that the metric60 ° type of thread angle on the stress intensity and load distribution uniformity is superior to the imperial55 ° type of thread Angle. And in the stress analysis of bolt connection screw or segment,nearly 40% of the applied load by force to bear on a few laps before thread. And along the spiral and direction of gradient distribution by load will decrease gradually. This is in line with China's modern industrial production using metric thread standards.
引文
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[12]刘秀丽,王燕,李美红,等.钢结构T形连接高强度螺栓受力分析及数值模拟[J].建筑科学与工程学报,2016,33(2):63-70.
[13]田振山,何明胜,郭坤,等.新型螺栓受力特性理论分析[J].建筑钢结构进展,2014,16(1):1-6.
[2]高连新,金烨,史交齐.圆螺纹套管接头应力分布规律研究[J].机械强度,2004,26(1):42-48.
[3]胡洁.螺纹连接件参数化及螺柱强度评定简析[J].机械工业标准化与质量,2013(5):18-21.
[4]欧阳卿.高强螺栓受力及疲劳性能研究[D].长沙:湖南大学硕士学位论文,2013:2-36.
[5]郑慧敏.网架螺栓球节点的应力集中分析[D].太原:太原理工大学硕士学位论文,2008:23-71.
[6]于慧力,冯新敏.现代机械零部件设计手册[M].北京:机械工业出版社,2013:18-24.
[7]徐建设,陈以一,韩琳等.普通螺栓和承压型高强螺栓抗剪连接滑移过程[J].同济大学学报,2003,31(5):510-514.
[8]山本晃.螺纹连接的理论与计算[M].上海:上海科学技术文献出版社,1984:6-38.
[9]武良臣.自动防松的螺纹联接[J].机械制造,1992(12):10-11.
[10]王小安,郭彦林.一种四角钢组合约束型防屈曲支撑外围连接的设计方法研究:数值分析[J].工程力学,2014,31(2):15-24.
[11]于喜年,卢志君,王海燕.港珠澳大桥桥塔与吊具连接高强螺栓群受力分析[J].桥梁建筑,2015,45(4):75-80.
[12]刘秀丽,王燕,李美红,等.钢结构T形连接高强度螺栓受力分析及数值模拟[J].建筑科学与工程学报,2016,33(2):63-70.
[13]田振山,何明胜,郭坤,等.新型螺栓受力特性理论分析[J].建筑钢结构进展,2014,16(1):1-6.