提出考虑焊接残余应力的结构模型参数修正方法。在预应力分布模型基础上建立含焊接残余应力的结构刚度矩阵方程，分析了焊接残余应力对结构刚度及结构振动特性的影响；以消除焊接残余应力对数值计算规模和计算精度的影响为目标。应用结构优化算法，以结构固有频率残差最小化为目标，开展有限元模型的结构参数修正研究；最后，以圆柱壳结构为例，实施基于结构模型参数修正的优化计算，验证方法的可行性。
Abstract
A structural model parameter updating method was proposed in present research.To improve the accuracy for the finite element model, the welding residual stress distribution problem was considered.The pre-stress matrix function was established based on the pre-stress distribution model, the influence of welding residual stress on structural stiffness and structural dynamic characteristic were discussed.In order to eliminate the influence of welding residual stress on the calculation scale and calculation?precision of complex structure, the structural model parameter updating was carried out by using the structural optimization strategy, in which to minimize the residual value of natural frequency parameter was defined as objective function.Finally, a cylindrical shell structure for example, the optimization calculation based on model parameter updating was carried out, and the feasible of the proposed method was verified.
关键词
模型参数修正 /
焊接残余应力 /
预应力刚度矩阵 /
模型重构
{{custom_keyword}} /
Key words
model parameter updating /
welding residual stress /
pre-stress matrix /
reverse design
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] Jin SS, Cho SJ, Jung HJ, et al. A new multi-objective approach to finite element model updating [J]. Journal of Sound and Vibration, 2014, 333(11): 2323-2338.
[2] Rosenzveig G, Louf F, Champaney L. A FE model updating method for the simulation of the assembly process of large and lightweight aeronautical structures [J]. Finite Elements in Analysis and Design, 2016, 111(1): 56-63.
[3] 宋汉文, 王丽炜, 王文亮. 有限元模型修正中若干重要问题[J]. 振动与冲击, 2003, 22(4): 68-72.
Song Hanwen, Wang Liwei, Wang Wenliang. Several important problems for updating finite element model [J]. Journal of Vibration and Shock, 2003, 22(4): 68-72.
[4] Yuan Q. A constrained matrix least-squares problem in structural dynamics model updating [J]. Journal of Computational and Applied Mathematics, 2015, 280 (2): 367-376.
[5] Mottershead JE, Link M, Friswell MI. The sensitivity method in finite element model updating: a tutorial [J]. Mechanical Systems and Signal Processing, 2011, 25(7): 2275-2296.
[6] 王巨涛, 王春洁, 宋顺广. 结构加速度频响函数模型修正的Kriging方法[J]. 工程科学学报, 2017, 39(7): 1087-1093.
Wang Jutao, Wang Chunjie, Song Shunguang. Structural model updating of acceleration frequency response function based on Kriging method [J]. Chinese Journal of Engineering, 2017, 39(7): 1087-1093.
[7] Yuan YX, Liu H. An iterative method for solving finite element model updating problems [J]. Applied Mathematical Modelling, 2011, 35 (2): 848-858.
[8] Li CL, Han Q, Liu YJ, et al. Investigation of wave propagation in double cylindrical rods considering the effect of prestress [J]. Journal of Sound and Vibration, 2015, 353(1): 164-180.
[9] Ashwear N, Eriksson A. Natural frequencies describe the pre-stress in tensegrity structures [J]. Computers and Structures, 2014, 138(9): 162-171.
[10] 杨念，陈炉云，易宏，等. 水下复杂应力结构的固有频率研究[J]. 振动与冲击, 2016, 35(22): 93-100.
Yang Nian, Chen Luyun, Yi Hong, et al. Study on the Natural frequency of underwater complex stress structure [J]. Journal of Vibration and Shock, 2016, 35(22): 93-100.
[11] Hamed E, Frostig Y. Natural frequencies of bonded and unbonded prestressed beams-prestress force effects [J]. Journal of Sound and Vibration, 2006, 295(1): 28-39.
[12] 陈章兰，叶家玮. 焊接热效应对船舶动力学性能影响的有限元分析[J]. 大连海事大学学报, 2013, 39(5): 53-56.
Chen Zhanglan, Ye Jiawei. Influence analysis of welding thermal effect on hull dynamic performance [J]. Journal of Dalian Maritime University, 2013, 39(5): 53-56.
[13] 陈炉云,李磊鑫,张裕芳.含局部预应力的圆柱壳结构声辐射特性研究[J].上海交通大学学报, 2014, 48(8): 772-777.
Chen Luyun, Li Leixin, Zhang Yufang. The influence of acoustic radiation property for cylindrical shell with prestress in local areas [J]. Journal of Shanghai Jiaotong University, 2014, 48(8): 772-777.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
PDF(1005 KB)
