排序方式: 共有4条查询结果,搜索用时 15 毫秒
1
1.
This study provides a detailed failure analysis of galvanized steel wires(3 mm in diameter) for a 35 k V transmission and distribution line, which was carried out by combining the conventional material analysis methods with the finite element method(FEM). It is found that the failed material had good plasticity(5% in elongation),and under the soft torsion loading condition(0.75 in stress state soft coefficient), the ductile fracture should occur on the material. Additionally, the theoretical number of torsions calculated by the FEM was 26.2 times, while the actual number of torsions achieved by the test was only 2.2 times and the local fracture surface exhibited brittle fracture characteristics. The results showed that the local torsion brittle fracture of the material with good plasticity was caused by triaxial stress in the torsion condition, which led to the formation of cavity in the pulling stress area in the material's center, and the finite element calculation results indicated that the stress state soft coefficient at the cavity was distributed between 0.31 and 0.38, and the stress concentration at the cavity was more than twice the normal value. Besides, the Widmanstatten structure formed as the improper hot working process is the corresponding structural reason. 相似文献
2.
舰空导弹引导射击方法中的误差传递分析 总被引:1,自引:0,他引:1
对舰空导弹引导射击的方法进行了阐述,分析了各环节所产生的误差及误差所服从的分布并构造了服从分布的随机数发生器,在此基础上利用蒙特卡罗法对误差传递后的误差量进行了模拟统计,并对仿真结果进行了分析。 相似文献
3.
4.
利用面向对象的方法定义建立空中目标(包括反舰导弹和舰空导弹)三维弹道仿真所需的类并确定类的继承关系,研究实现类中空中目标的空间坐标表示和计算方法,依据一定作战要求及引导规律建立相应目标弹道模型,并进行三维弹道仿真结果演示。 相似文献
1