摘要
以某现役高速列车车体局部结构为研究对象,应用有限元软件建立对应于试验条件下受试试件的静力学模型,计算得到不同加载形式下构件危险部位的应力分布;在实验室中,对取自相同焊接部位的不同形式的试件(板试样和T型试样)分别进行单轴拉伸疲劳和弯曲疲劳寿命测试,获得各自的寿命分布及其特征统计量。对比两种试样危险部位的应力分布和试验数据可知:在两种不同形式的试件、两种不同加载方式的试验中,合理选择加载参数,可以得到相近的失效部位和应力-寿命参数。
Taking the local parts of high-speed train in service as the research obj ect,the static form of the finite element model is established,and the dangerous parts of the stress distribution under different load form corresponding to loading and displacement conditions applied in experimental test is calculated.Fatigue life of the same welded parts of the different forms due to the state of the uniaxial tensile and the bending is respectively tested in the lab,and the life distribution and characteristics of their statistics are obtained.Compared to the stress distribution of dan-gerous parts and data of the test,it is clear that the similar parameters of life and failure forms can be received if it chooses the reasonable load parameters in different form and loading in the test.
出处
《工程与试验》
2014年第1期12-16,63,共6页
Engineering and Test
基金
国家自然科学基金项目(51175072)
高等学校博士学科专项科研基金课题(课题编号:20110042130003)
关键词
焊接结构
寿命测试
拉伸疲劳
弯曲疲劳
welded structure
life test
tensile fatigue
bending fatigue
