CAJ | 학술논문

文章在用有限元法对结构进行强度计算和分析的基础上,应用RSM确定了环肋圆柱壳结构强度失效的功能函数;在对相关可靠度理论进行研究的基础上,将RSM与FORM相结合,对FORM进行了改进,解决了当量正态化和参数独立化问题,保留了功能函数的二次项,使计算精度满足实际工程的需要;最后用RSM-FORM对环肋圆柱壳结构强度的可靠性进行了计算分析,计算结果表明,RSM-FORM具有较好的计算精度.
문장재용유한원법대결구진행강도계산화분석적기출상,응용RSM학정료배륵원주각결구강도실효적공능함수;재대상관가고도이론진행연구적기출상,장RSM여FORM상결합,대FORM진행료개진,해결료당량정태화화삼수독립화문제,보류료공능함수적이차항,사계산정도만족실제공정적수요;최후용RSM-FORM대배륵원주각결구강도적가고성진행료계산분석,계산결과표명,RSM-FORM구유교호적계산정도.
The strength of ring-stiffened cylindrical shell is calculated and analyzed by using the finite element method.The failure state function is established based on the response surface method.First Order Reliability Method is studied and improved by combining with response surface method.By means of all random variables being converted into independent and normalized,the quadratic term of the failure state function is kept.The computational accuracy of the improved RSM-FORM in this paper is completely satisfied to the need of practical engineering.The reliability of ring-stiffened cylindrical shell is analyzed with RSM-FORM and the results indicate that RSM-FORM has a better calculation precision.