天津大学学报
天津大學學報
천진대학학보
JOURNAL OF TIANJIN UNIVERSITY SCIENCE AND TECHNOLOGY
2015年
4期
355-361
,共7页
ANSYS二次开发%弹塑性刚度矩阵%分段线性化%等效弹性模量%稀疏矩阵%模态分析%动力时程分析
ANSYS二次開髮%彈塑性剛度矩陣%分段線性化%等效彈性模量%稀疏矩陣%模態分析%動力時程分析
ANSYS이차개발%탄소성강도구진%분단선성화%등효탄성모량%희소구진%모태분석%동력시정분석
ANSYS secondary development%elastic-plastic stiffness matrix%piecewise linearization%equivalent elastic modulus%sparse matrix%modal analysis%dynamic time history analysis
利用ANSYS二次开发工具UPFs编写成可执行程序文件，通过与MATLAB进行联立计算，对线弹性和非线性弹塑性本构模型的结构分别实现了特性矩阵的近似提取。对线性本构关系模型的各特性矩阵提取方法进行阐述推导和验证，求得的各阶频率和动态响应时程曲线与 ANSYS 直接计算法吻合。对于非线性弹塑性本构模型，将非线性本构关系在全局过程中的小段时间内进行等效线性化处理后提取等效刚度矩阵，进行静动力分析后所得各种响应时程曲线与 ANSYS 直接计算法所得曲线基本吻合。结果表明了分段等效线性化模型的合理性和ANSYS二次开发程序提取等效特性矩阵的可行性。
利用ANSYS二次開髮工具UPFs編寫成可執行程序文件，通過與MATLAB進行聯立計算，對線彈性和非線性彈塑性本構模型的結構分彆實現瞭特性矩陣的近似提取。對線性本構關繫模型的各特性矩陣提取方法進行闡述推導和驗證，求得的各階頻率和動態響應時程麯線與 ANSYS 直接計算法吻閤。對于非線性彈塑性本構模型，將非線性本構關繫在全跼過程中的小段時間內進行等效線性化處理後提取等效剛度矩陣，進行靜動力分析後所得各種響應時程麯線與 ANSYS 直接計算法所得麯線基本吻閤。結果錶明瞭分段等效線性化模型的閤理性和ANSYS二次開髮程序提取等效特性矩陣的可行性。
이용ANSYS이차개발공구UPFs편사성가집행정서문건，통과여MATLAB진행련립계산，대선탄성화비선성탄소성본구모형적결구분별실현료특성구진적근사제취。대선성본구관계모형적각특성구진제취방법진행천술추도화험증，구득적각계빈솔화동태향응시정곡선여 ANSYS 직접계산법문합。대우비선성탄소성본구모형，장비선성본구관계재전국과정중적소단시간내진행등효선성화처리후제취등효강도구진，진행정동력분석후소득각충향응시정곡선여 ANSYS 직접계산법소득곡선기본문합。결과표명료분단등효선성화모형적합이성화ANSYS이차개발정서제취등효특성구진적가행성。
Executable program for feature matrices extraction was written by using ANSYS secondary develop-ment tools UPFs. With MATLAB simultaneous calculation, the feature matrices of the linear elastic and nonlinear elastic-plastic constitutive model were respectively extracted. For the linear constitutive model, the extraction method of those feature matrices were derived and affirmed. All order frequencies and response curves were coin-cided with ANSYS direct calculation method on the linear constitutive model. Within short time of the entire pe-riod,the nonlinear constitutive model was transformed through equivalent linearization for extracting the equivalent stiffness matrix. The static and dynamic response time history curves were basically coincided with the ANSYS direct calculation method. Results show that the piecewise equivalent linearization is rational and the ANSYS secondary development program is feasible and accurate.
