Identification of rubber isolator dynamics: substructure frequency response functions for identification and cross validation

The dataset contains numerical and experimental frequency response function (FRF) data of substructures for rubber isolator identification. In both cases, two cross structures (C1 and C2) are mounted on either side of the rubber isolator, facilitating substructure excitation and response measurement in all directions, allowing one to perform the virtual point transformation (VPT) to obtain a twelve-degree-of-freedom (DoF) joint model representing the rubber isolator. Apart from FRFs of C1, C2, and C1_J_C2 substructures, FRFs of substructures A, B, and A_J_B are also provided, where A and B are connected by two identical rubber isolators. This allows one to cross-validate the identified joint model. The numerical FRF data is obtained by forming finite element method (FEM) models of substructures C1, C2, A, J (rubber isolator), and B, where aluminum material properties are assigned to C1, C2, A, and B, while the isolator (J) material properties resemble a rubber-like material. Mode superposition is used to synthesize the numerical FRFs. The experimental FRFs are obtained via impact excitation of substructures C1, C2, A, B, and assemblies C1_J_C2 and A_J_B, where A and B are made of aluminum, while the isolator (J) between C1 and C2 (and also between A and B) is made of rubber. Substructure excitation is performed using a modal impact hammer, while the response is measured using accelerometers. The H1 FRF estimator is used to estimate the FRFs of all substructures. All FRFs are expressed in accelerance form. FRFs of a single substructure are stacked into an admittance matrix of shape (N_f, N_o, N_i), where N_f is the number of frequency lines, N_o is the number of response (output) degrees of freedom (DoFs), and N_i is the number of excitation (input) DoFs. The numerical FRF data, as well as response and excitation DoF location and orientation data are included in the file "numerical.h5", while the experimental data is included in the file "experimental.h5". Details regarding the organization of the files are provided in README.md. 3D models of substructures C1, C2, C1_J_C2, A, B, and A_J_B are also provided as STL files in the same coordinate system as response and excitation locations. Units used for STL files are millimeters. However, response and excitation DoF locations are provided in meters. Names of STL files corresponding to numerical substructures end with _num, while the names of STL files corresponding to experimental substructures end with _exp. FRF units are m/s²/N.本数据集包含用于橡胶隔振器辨识的子结构数值与实验频响函数(FRF)数据。两类场景中，两个十字形结构（C1与C2）分别安装于橡胶隔振器的两侧，可实现子结构全向激励与响应测量，支持通过虚拟点变换(VPT)得到表征橡胶隔振器的12自由度(DoF)连接副模型。除C1、C2及C1_J_C2子结构的频响函数外，本数据集还提供子结构A、B及A_J_B的频响函数，其中A与B通过两个相同的橡胶隔振器相连，可用于对辨识得到的连接副模型进行交叉验证。 数值频响函数数据通过对C1、C2、A、J（橡胶隔振器）及B子结构建立有限元法(FEM)模型得到，其中C1、C2、A、B赋予铝合金材料属性，隔振器J的材料属性类橡胶材料。本数据集采用模态叠加法合成数值频响函数。 实验频响函数通过对C1、C2、A、B子结构以及C1_J_C2、A_J_B装配体进行冲击激励得到，其中A、B为铝合金材质，C1与C2之间（以及A与B之间）的隔振器J为橡胶材质。子结构激励采用模态冲击锤完成，响应则通过加速度传感器测量。本数据集使用H1频响函数估计器对所有子结构的频响函数进行估计。 所有频响函数均以加速度导纳形式表达。单个子结构的频响函数被堆叠为形状为(N_f, N_o, N_i)的导纳矩阵，其中N_f为频率点数，N_o为响应（输出）自由度(DoF)数量，N_i为激励（输入）自由度数量。数值频响函数数据、响应与激励自由度的位置及方向数据均存储于文件"numerical.h5"中，实验数据则存储于"experimental.h5"。文件组织细节可参见README.md。 子结构C1、C2、C1_J_C2、A、B及A_J_B的三维模型以STL文件格式提供，其坐标系与响应、激励位置的坐标系一致。STL文件的单位为毫米，而响应与激励自由度的位置单位为米。对应数值子结构的STL文件名称以"_num"结尾，对应实验子结构的STL文件名称以"_exp"结尾。频响函数的单位为m/s²/N。