The second chapter introduces the design concept, the program structure and the build method of Bus Body Structure Concept Design System (BCD-ICAE), and gives a brief introduction of the main UG secondary development tools.
第二章主要介绍了客车车身结构概念设计系统（BCD-ICAE）的设计理念、程序结构和实现方法，简要介绍了主要的UG二次开发工具。
On the basis, the characteristics called the ICA Energy (ICAE) and the Filtered ICAE (FICAE) are used for the noisy signal endpoint detection.
在此基础上提出了ICA能量（ICAE）和滤波ICAE（FICAE）特征来进行端点检测。
The fourth chapter introduces some examples of using BCD-ICAE to perform the FEA on the bus body concept model, including bending stiffness analysis, torsion stiffness analysis and modal analysis. Then this paper briefly introduces the correlation basic theories.
第四章介绍了使用BCD-ICAE系统对客车车身结构概念模型进行有限元分析的实例，分别进行了弯曲刚度分析、扭转刚度分析和模态分析，并且简要介绍了相关基本理论。