Vibration-based feature extraction of determining dynamic characteristic for engine block low vibration design

作     者：杜宪峰 李志军 毕凤荣 张俊红 王霞 邵康 

作者机构：State Key Laboratory of Engines(Tian jin University) 

基　　金：Project(50975192) supported by the National Natural Science Foundation of China Project(10YFJZJC14100) supported by Tianjin Municipal Natural Science Foundation of China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2012年第19卷第8期

页      码：2238-2246页

摘      要：In order to maintain vibration performances within the limits of the design, a vibration-based feature extraction method for dynamic characteristic using empirical mode decomposition (EMD) and wavelet analysis was proposed. The proposed method was verified experimentally and numerically by implementing the scheme on engine block. In the implementation process, the following steps were identified to be important:1) EMD technique in order to solve the feature extraction of vibration signals; 2) Vibration measurement for the purpose of confirming the structural weak regions of engine block in experiment; 3) Finite element modeling for the purpose of determining dynamic characteristic in time region and frequency region to affirm the comparability of response character corresponding to improvement schemes; 4) Adopting a feature index of IMF for structural improvement based on EMD and wavelet analysis. The obtained results show that IMF of signal is more sensitive to response character corresponding to improvement schemes. Finally, examination of the results confirms that the proposed vibration-based feature extraction method is very robust, and focuses on the relative merits of modification and full-scale structural optimization of engine, together with the creation of new low-vibration designs.

主 题 词：信号特征提取 发动机缸体 振动设计 动态特性 经验模式分解 小波分析 提取方法 验证实验 

学科分类：080703[080703] 0806[工学-电气类] 08[工学] 0807[工学-电子信息类] 

核心收录：

D　O　I：10.1007/s11771-012-1268-y

馆 藏 号：203312185...