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In order to analyze the dynamic characteristics of electric vehicle body, a modal test is used to identify the modal parameters of an electric vehicle Body-In-White (BIW), and the test results are compared with traditional modal test results through the acceleration sensor. The results show that the maximum error of natural frequency of BIW obtained through 3D laser vibrometry is less than 1.3% and have a high consistency with the vibration mode obtained from the traditional modal test, which verifies the feasibility and accuracy of this test method.
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为分析电动汽车车身的动态特性,利用三维扫描式激光测振仪开展模态测试,识别某电动汽车白车身主要模态参数,并将测试结果与采用加速度传感器的传统模态试验结果进行对比,结果表明,三维激光测振方法获得的白车身固有频率最大误差不超过1.3%,且与传统模态试验获得的振型一致性较高,验证了该方法的可行性及准确性。
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49(7): 988-997., articleTitle=Optical Measurement of the Dynamic Strain Field of a Fan Blade Using a 3D Scanning Vibrometer, refAbstract=null)], funds=[Fund(id=1200070661679969193, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070654482543091, awardId=2020YFB1709400, language=CN, fundingSource=*国家重点研发计划项目(2020YFB1709400), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1200070656831353434, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070654482543091, xref=null, ext=[AuthorCompanyExt(id=1200070656843936349, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070654482543091, companyId=1200070656831353434, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Geely Automobile Research Institute (Ningbo) Co., Ltd., Ningbo 315336), AuthorCompanyExt(id=1200070656864907871, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070654482543091, companyId=1200070656831353434, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=吉利汽车研究院(宁波)有限公司, 宁波 315336)])], figs=[ArticleFig(id=1200070660497175338, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070654482543091, language=EN, label=null, caption=null, figureFileSmall=6o33LNYYe5e/tiIduaU5RA==, figureFileBig=p2+pHe3oVbt+CEYNWLZq7Q==, tableContent=null), ArticleFig(id=1200070660618810167, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070654482543091, language=CN, label=图1, caption=
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2种方法第4阶模态振型对比, figureFileSmall=r6ow+sac23aVCXPa1tuwXw==, figureFileBig=JcZZy6mVl7IJtm9VMjfKmg==, tableContent=null), ArticleFig(id=1200070661369590665, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070654482543091, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
模态 阶次 | 模态频率/Hz | 相对误差/% | 振型 |
传统模态 试验 | 三维激光 测振 |
| 1 | 36.9 | 37.1 | 0.5 | 整车1阶弯曲 |
| 2 | 45.2 | 45.8 | 1.3 | 前端横摆 |
| 3 | 46.9 | 47.2 | 0.6 | 整车1阶扭转 |
| 4 | 55.6 | 55.7 | 0.2 | 前端S弯 |
| 5 | 60.1 | 60.4 | 0.5 | 前端Z向弯曲 |
| 6 | 67.1 | 67.5 | 0.6 | 整车S弯 |
| 7 | 70.5 | 70.8 | 0.4 | 后端呼吸模态 |
| 8 | 75.1 | 75.9 | 1.1 | 前端扭转模态 |
), ArticleFig(id=1200070661495419797, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070654482543091, language=CN, label=表1, caption=
白车身模态测量结果对比
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模态 阶次 | 模态频率/Hz | 相对误差/% | 振型 |
传统模态 试验 | 三维激光 测振 |
| 1 | 36.9 | 37.1 | 0.5 | 整车1阶弯曲 |
| 2 | 45.2 | 45.8 | 1.3 | 前端横摆 |
| 3 | 46.9 | 47.2 | 0.6 | 整车1阶扭转 |
| 4 | 55.6 | 55.7 | 0.2 | 前端S弯 |
| 5 | 60.1 | 60.4 | 0.5 | 前端Z向弯曲 |
| 6 | 67.1 | 67.5 | 0.6 | 整车S弯 |
| 7 | 70.5 | 70.8 | 0.4 | 后端呼吸模态 |
| 8 | 75.1 | 75.9 | 1.1 | 前端扭转模态 |
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