模件式战术导弹舱内战斗部装配刚度辨识方法研究  

Research on the Identification Method for Assembly Stiffness of Warhead in the Modular Tactical Missile

作　　者：商霖[1] 张程[1] 周晓和[1] 迟学谦 孟令涛[1] SHANG Lin;ZHANG Cheng;ZHOU Xiaohe;CHI Xueqian;MENG Lingtao(China Academy of Launch Vehicle Technology,Beijing,100076)

机构地区：[1]中国运载火箭技术研究院,北京100076

出　　处：《导弹与航天运载技术（中英文）》2023年第6期23-30,共8页Missiles and Space Vehicles

摘　　要：为了研究模件式战术导弹舱内战斗部装配刚度的辨识方法,以试验模态参数和有限元模型为基础,提出了一种通过模态特征方程反问题辨识模件式战术导弹舱内战斗部装配刚度参数的新方法。该方法以模态特征方程为基础,利用连接单元刚度矩阵的三对角线特征,推导得到了装配位置连接节点的内力和位移之间的关系方程。随后根据导弹的特点,采用三分段法进行质量和刚度分段,构建导弹动力学模型并进行模态分析。在数值试验中,将模态参数和导弹主体/分支结构的质量与刚度矩阵代入关系方程,最终辨识得到导弹主体结构和分支结构装配位置的刚度矢量值。数值试验结果验证了辨识方法的有效性和可靠性。Based on the experimental modal parameters and the finite element models,an analysis method is presented to identify the assembly stiffness parameters between missile cabin and warhead with the aid of an inverse problem of characteristic equation.On the basis of the modal characteristic equation and using the tri-diagonal characteristic of the stiffness matrix of the connection element,the relation equation between the internal force and displacement of the connection node at the assembly position is derived.According to the characteristics of the missile,the three-segment method is used to build the dynamical model,and carried the modal analysis is carried.In the numerical test,the modal parameters and the mass and stiffness matrix of the missile is substituted into the relation equation,and finally the assembly stiffness is identified.The numerical results show that the proposed method is effective and reliable.

关 键 词：辨识方法 连接单元 装配刚度 模态特征方程 三对角线矩阵 

分 类 号：O32[理学—一般力学与力学基础] V19[理学—力学]