| 刁杰胜,刘文慧,尹杨平.白车身固有振动特性CAE及试验分析对比[J].井冈山大学自然版,2019,40(2):72-76 |
| 白车身固有振动特性CAE及试验分析对比 |
| CONTRAST OF CAE AND EXPERIMENTAL ANALYSIS METHOD FOR NATURAL VIBRATION CHARACTERISTIC OF BIW |
| 投稿时间：2018-12-29 修订日期：2019-01-11 |
| DOI：10.3969/j.issn.1674-8085.2019.02.013 |
| 中文关键词: 固有振动特性 NVH性能 试验分析 CAE分析 汽车生产成本 |
| 英文关键词: natural vibration characteristic NVH performance experimental analysis CAE analysis car production cost |
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| 中文摘要: |
| 汽车NVH性能设计需对白车身的固有振动特性进行分析。本文根据白车身模态实验的状态，建立相应的有限元模型，并对CAE和试验结果进行对比。结果表明：白车身的前三阶振型一致，第四阶振型基本一致；各个振型对应的固有频率误差在5%内；前二阶试验和CAE的固有频率略低于目标值要求，暂时风险接受，待路试试验验证后再决定是否进行优化；第三阶和第四阶试验和CAE固有频率都满足目标值要求。根据CAE规范分析得到的结果具有较高精度，针对本车，可用CAE方法进行模态优化，这对降低汽车生产成本，改善NVH性能具有重要意义。 |
| 英文摘要: |
| The natural vibration characteristic of BIW (body in white) should be analyzed in the process of NVH (noise vibration and harshness) performance design for the vehicle.The finite element model is established according to the state of modal experiment for the BIW.The results show that the first three orders of mode shapes for the BIW are the same by the method of CAE (computer added engineering) and experiment.The fourth-order shape is largely consistent.Each proper frequency of each shape has a maximum error of 5%.The first two orders proper frequency measured by the two methods mentioned above are approaching the goal.Both the CAE and experiment results are accepted by risk temporarily.The optimization will be done when the results of test on road are not good.Both the third and fourth-order proper frequencies measured by the two methods meet the goal.The\results have high accuracy using the method mentioned in the CAE specifications.The modal optimization for the vehicle can use the CAE method.It has significant importance to optimize automobile structures,reduce car production cost and improve NVH performance by using the CAE analysis method. |
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