基于有效模态质量的子结构主模态选择方法
Selection of Substructure Normal Modes Based on Effective Modal Mass
邓兆祥 1李兴泉 2章竟成 3李英强 3阳小光1
作者信息
- 1. 重庆大学,机械传动国家重点实验室,重庆400030;汽车噪声振动和安全技术国家重点实验室,重庆400039
- 2. 重庆大学,机械传动国家重点实验室,重庆400030;重庆长安铃木汽车有限公司,重庆401321
- 3. 重庆大学,机械传动国家重点实验室,重庆400030
- 折叠
摘要
根据建筑物抗震设计中有效模态质量计算的基本原理,推导了固定界面模态综合中子结构各阶主模态的模态参与因子和有效模态质量,以及总的有效模态质量的计算方法.根据各阶有效模态质量与总的有效模态质量之比,对某样车模型的子结构主模态进行截断.结果表明:在一定频率范围内,采用子结构主模态截断法,仅保留少数低阶主模态,即可使样车低频振动特性计算结果具有较高的精度.
Abstract
Based on the basic principle of effective modal mass calculation in the seismic design of building,a calculation method for the modal participation factor and effective modal mass for each normal mode of substructure,as well as the total effective mass in fixed interface modal synthesis is derived.The normal modes of each substructure for a sample vehicle are truncated base on the ratio of each normal mode effective mass over total effective mass.The results show that in certain frequency range,using substructure normal mode truncation method can get a calculation result of the low-frequency vibration characteristics of sample vehicle with high accuracy by retaining only a few low-order normal modes.
关键词
振动/频率/模态综合/子结构/有效模态质量Key words
vibration/frequency/component mode synthesis/substructure/effective modal mass引用本文复制引用
基金项目
出版年
2013
NETL
NSTL
维普
万方数据