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To solve the complex challenge of response calculation for the coupling system between the infinitelength road and vehicle, the elastic characteristics of foundation and road roughness are considered in the analysis, and a vehicleroad vibration coupling system is established based on an infinite length EulerBernoulli beam model. Then, the moving coordinate system was set up using the vehicle as the reference point. The analytical solution of vibration response of the coupled system was derived by integral transformation. The numerical calculations were carried out by applying the residue theorem, and the semianalytical solutions for the vehicle's vertical displacement, acceleration and road vibration response were obtained. Compared to the traditional modal superposition method used for the coupling response of finite
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针对无限长道路与车辆耦合系统响应计算复杂难题,考虑地基的弹性特性与道路不平度,建立基于无限长欧拉伯努利梁模型的车路振动耦合系统。进而以车辆为参考点建立移动坐标系,提出通过积分变换推导耦合系统振动响应解析解的方法,并应用留数定理对其进行数值计算,获得车辆垂向位移、加速度、路面振动响应等系统响应的半解析解。与传统应用模态叠加法的有限长道路与车辆耦合响应相比,具有更高的计算效率与精度,系统参数化研究也证明了该半解析解的有效性。
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张步云(1987-),男,江苏淮安人,博士,副教授,主要研究方向为振动测试与控制、车辆随机动力学分析。Tel: 13914560131 E-mail:
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 |
赵妍(1996-),女,河南周口人,硕士研究生,主要研究方向为车路耦合振动分析、车辆舒适性和道路友好性优化与控制。Tel: 18252586072 E-mail:2391850117@qq.com |
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无限长路面与有限长路面车路耦合振动系统响应对比, figureFileSmall=W/G8lZj1+GdYNWdsRM1J6A==, figureFileBig=G9GY2MvbqwNJ5Dxc94aqug==, tableContent=null), ArticleFig(id=1153982929769325506, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1153982906327360375, language=EN, label=null, caption=null, figureFileSmall=d7q6Qy4+KnJnDlxdYatW+g==, figureFileBig=gWLaEv0yQN6AsHjID/yiIQ==, tableContent=null), ArticleFig(id=1153982929815462851, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1153982906327360375, language=CN, label=图 3, caption=
模态数对车路耦合振动系统的影响, figureFileSmall=d7q6Qy4+KnJnDlxdYatW+g==, figureFileBig=gWLaEv0yQN6AsHjID/yiIQ==, tableContent=null), ArticleFig(id=1153982929874183108, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1153982906327360375, language=EN, label=null, caption=null, figureFileSmall=z6DoZlleSKnNASnu7ibRzw==, figureFileBig=3SGFdTQQESatvq1aMVXaBw==, tableContent=null), ArticleFig(id=1153982929932903365, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1153982906327360375, language=CN, label=图 4, caption=
路面长度对车路耦合振动系统的影响图 4a可知,随着路面长度的增加,应用模态叠加法求得的有限长路面与车辆振动耦合系统的路面位移响应随着路面长度的增加而减小, 并逐渐远离于无限长路面与车辆振动耦合系统的振动响应, 两种求解方法的一致性减小。这表明随着路面长度的增加, 模态叠加法的计算结果反而与无限长路面的计算结果差距越来越大, 这是因为当路面长度较长时, 用模态叠加法计算其响应时所需要的模态数也应相应地增多。如仍用较低模态数则会导致计算结果的误差增大, 但模态数的增加又会提高计算成本。因此, 求解基于无限长路面的车路耦合振动系统的半解析解显得更加重要。此外,由图 4b 和 c 可知, 随着路面长度的增加, 有限长路面与车辆振动耦合系统的车辆位移和加速度响应变化相对较小。, figureFileSmall=z6DoZlleSKnNASnu7ibRzw==, figureFileBig=3SGFdTQQESatvq1aMVXaBw==, tableContent=null), ArticleFig(id=1153982929983235014, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1153982906327360375, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 模态数 | 仿真时间/h | 梁长/m | 仿真时间/h |
| 5 | 0.33 | 30 | 5.71 |
| 10 | 1.85 | 60 | 8.28 |
| 20 | 5.25 | 80 | 10.19 |
| 30 | 7.82 | 120 | 15.75 |
), ArticleFig(id=1153982930100675527, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1153982906327360375, language=CN, label=表 1, caption=
模态叠加法仿真时间对比表, figureFileSmall=null, figureFileBig=null, tableContent=
| 模态数 | 仿真时间/h | 梁长/m | 仿真时间/h |
| 5 | 0.33 | 30 | 5.71 |
| 10 | 1.85 | 60 | 8.28 |
| 20 | 5.25 | 80 | 10.19 |
| 30 | 7.82 | 120 | 15.75 |
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