摘要
分别采用CWELD和RBE2单元,模拟某副车架的焊点,利用MSC.NASTRAN软件计算其模态和扭转刚度,并与实验结果进行比较,结果表明,焊点采用CWELD与焊点采用RBE2模拟连接的副车架模态仿真结果,与实验结果的误差都在5%之内。CWELD模拟连接比RBE2模拟连接刚度强,两者的模态和扭转刚度仿真结果的误差在4%之内,但由于CWELD单元效率较高,所以在计算车体部件的模态和刚度时,推荐采用CWELD模拟焊点。
Weld a sub-frame by CWELD and RBE2 elements separately. Then submit the two models to MSC. NASTRAN for modal and torsional-stiffness analysis. Compared with the experimental results ,the modal simulation results of the models welded by CWELD and RBE2 elements are both in error within 5%. As for the torsional-stiffness,the sub-frame model welded by CWELD elements is more rigid than the one welded by RBE2 elements. And both the modal simulation results and the torsional-stiffness simulation results of the two models are in error within 4%. However, due to higher efficiency of CWELD connection,recommend CWELD elements to model welds in FEA, especially in modal and stiffness analysis of vehicle parts.
出处
《现代制造工程》
CSCD
北大核心
2009年第4期116-118,共3页
Modern Manufacturing Engineering
