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To overcome the challenges of NTF simulation accuracy in vehicle NVH simulations, the paper designed and constructed a “rigidwall occupant cabin", which reduced the coupling effect between the "acoustic cavity mode” and the “container" to a negligible extent. Based on the rigidwall passenger cabin, the influence of subacoustic cavities on the overall acoustic cavity mode was analyzed, and the modeling method for porous materials was discussed. The porous material models such as seats and carpets were established, and the effect of front wall sound insulation material on the coupling of sheet metal vibration and acoustic cavity mode was analyzed quantitatively. The simulation and test results show that the cavity mode, airborne sound transfer function, structural vibration transfer function and sound transfer function all achieve good simulation accuracy. The findings of this paper provide a reference for the control of low frequency road noise and engine noise.
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为突破汽车NVH仿真中NTF仿真精度难题,设计制作了“刚性壁乘员舱”,把“声腔模态”与“容器”的耦合效应降到可以忽略。基于此刚性壁乘员舱,分析了子声腔对整体声腔模态的影响,讨论了多孔材料的建模方法,建立了座椅和地毯等多孔材料模型,量化分析了前围隔声材料对钣金振动与声腔模态耦合的影响。仿真和试验对标的结果表明,空腔模态、空气传递声传递函数、结构传递振动传递函数和声传递函数均获得较好的仿真精度,为整车低频路噪和发动机噪声控制提供了参考。
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张荣荣(1978-),女,江苏徐州人,硕士,高级工程师,主要研究方向为新能源汽车的整车性能开发,涉及结构耐久、被动安全、NVH、整车热管理、车辆空气动力学。Tel:18998125553 E-mail:zhang.rongrong@byd.com |
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张荣荣(1978-),女,江苏徐州人,硕士,高级工程师,主要研究方向为新能源汽车的整车性能开发,涉及结构耐久、被动安全、NVH、整车热管理、车辆空气动力学。Tel:18998125553 E-mail:zhang.rongrong@byd.com
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张荣荣(1978-),女,江苏徐州人,硕士,高级工程师,主要研究方向为新能源汽车的整车性能开发,涉及结构耐久、被动安全、NVH、整车热管理、车辆空气动力学。Tel:18998125553 E-mail:zhang.rongrong@byd.com
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激振声源位置相对第 6 阶模态节线, figureFileSmall=Tmi5/8pZKWCiyeIXUhV/oA==, figureFileBig=csptiEXusYH2Js0plncH9g==, tableContent=null), ArticleFig(id=1154016963945816294, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1154016884551836246, language=EN, label=null, caption=null, figureFileSmall=UzHHaALwWxZf90kqERQlWw==, figureFileBig=Y1Lkx68wjtJ90OwCapDDMQ==, tableContent=null), ArticleFig(id=1154016964017119463, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1154016884551836246, language=CN, label=图 6, caption=
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三个状态下钢板VTF和乘员舱内NTF比较, figureFileSmall=PQiN6t6k4SG8DK03DBIoIg==, figureFileBig=3O/Vbpy8n6aEoLBYV1Y8RQ==, tableContent=null), ArticleFig(id=1154016965057306874, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1154016884551836246, language=EN, label=null, caption=null, figureFileSmall=DzG4g7wjxCgvgHEVZSAW2Q==, figureFileBig=zl1qx6YgpkI5u5za7v53Lg==, tableContent=null), ArticleFig(id=1154016965107638523, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1154016884551836246, language=CN, label=图 16, caption=
裸钢板和裸钢板+隔声材料VTF仿真结果, figureFileSmall=DzG4g7wjxCgvgHEVZSAW2Q==, figureFileBig=zl1qx6YgpkI5u5za7v53Lg==, tableContent=null), ArticleFig(id=1154016965170553084, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1154016884551836246, language=EN, label=null, caption=null, figureFileSmall=ODZ25ZWi0S7neONOfQva/A==, figureFileBig=u1iRpDioDLdwfyVUfMVXTw==, tableContent=null), ArticleFig(id=1154016965212496125, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1154016884551836246, language=CN, label=图 17, caption=
裸钢板+隔声材料+座椅/地毯NTF对标结果, figureFileSmall=ODZ25ZWi0S7neONOfQva/A==, figureFileBig=u1iRpDioDLdwfyVUfMVXTw==, tableContent=null), ArticleFig(id=1154016965262827774, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1154016884551836246, language=EN, label=null, caption=null, figureFileSmall=DHct2nmd5BhoucjEmXvm0A==, figureFileBig=9UmEprvzJeiMR84X/fH10g==, tableContent=null), ArticleFig(id=1154016965313159423, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1154016884551836246, language=CN, label=图 18, caption=
裸钢板+隔声材料VTF试验/仿真(传统方法/本文推荐方法)结果对比, figureFileSmall=DHct2nmd5BhoucjEmXvm0A==, figureFileBig=9UmEprvzJeiMR84X/fH10g==, tableContent=null), ArticleFig(id=1154016965363491072, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1154016884551836246, language=EN, label=null, caption=null, figureFileSmall=2hzJ8bn85Qq5TSuMpRWefQ==, figureFileBig=F/FCr6hhyY4ovvDh4DEQnQ==, tableContent=null), ArticleFig(id=1154016965418017025, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1154016884551836246, language=CN, label=图 19, caption=
裸钢板+隔声材料+座椅/地毯NTF试验/仿真(传统方法/新方法) 结果对比, figureFileSmall=2hzJ8bn85Qq5TSuMpRWefQ==, figureFileBig=F/FCr6hhyY4ovvDh4DEQnQ==, tableContent=null), ArticleFig(id=1154016965468348674, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1154016884551836246, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 阶数 | 测试频率 | 仿真频率 | 频率偏差 | MAC |
| 1 | M 1-54.89 | M 2-55.37 | -0.87 | 1.00 |
| 2 | M_2-108.53 | M_3-107.20 | 1.23 | 0.99 |
| 3 | M 3-133.58 | M_4-132.20 | 1.03 | 0.95 |
| 4 | M_4-141.47 | M 5-144.30 | -2.00 | 0.92 |
| 5 | M 5-160.98 | M 7-158.50 | 1.54 | 0.90 |
| 6 | M 6-176.54 | M 8-170.20 | 3.59 | 0.61 |
| 7 | M 7-203.35 | M_10-198.40 | 2.43 | 0.73 |
| 8 | M 8-221.74 | M_13-214.50 | 3.27 | 0.88 |
| 9 | M 9-233.18 | M_14-226.10 | 3.04 | 0.96 |
| 10 | M_10-238.75 | M_15-233.90 | 2.03 | 0.90 |
| 11 | M_11-248.77 | M 16-244.20 | 1.84 | 0.86 |
| 12 | M_12-263.83 | M 19-260.70 | 1.19 | 0.64 |
| 13 | M_13-283.89 | M_23-278.90 | 1.76 | 0.88 |
| 14 | M_14-294.94 | M_24-289.80 | 1.74 | 0.88 |
| 15 | M 15-307.69 | M 26-302.10 | 1.82 | 0.87 |
| 16 | M_16-312.53 | M 28-305.70 | 2.19 | 0.88 |
| 17 | M 17-324.45 | M 31-317.60 | 2.11 | 0.92 |
| 18 | M 18-331.13 | M 32-324.60 | 1.97 | 0.85 |
| 19 | M_19-353.22 | M_39-346.30 | 1.96 | 0.88 |
| 20 | M_20-360.48 | M_40-353.70 | 1.88 | 0.88 |
| 21 | M 21-370.46 | M_43-365.30 | 1.39 | 0.84 |
| 22 | M_22-375.30 | M 44-368.00 | 1.95 | 0.85 |
| 23 | M_23-387.77 | M 47-381.60 | 1.59 | 0.75 |
| 24 | M 24-400.94 | M_52-395.80 | 1.28 | 0.80 |
), ArticleFig(id=1154016965539651843, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1154016884551836246, language=CN, label=表 1, caption=
仿真与试验模态对标结果, figureFileSmall=null, figureFileBig=null, tableContent=
| 阶数 | 测试频率 | 仿真频率 | 频率偏差 | MAC |
| 1 | M 1-54.89 | M 2-55.37 | -0.87 | 1.00 |
| 2 | M_2-108.53 | M_3-107.20 | 1.23 | 0.99 |
| 3 | M 3-133.58 | M_4-132.20 | 1.03 | 0.95 |
| 4 | M_4-141.47 | M 5-144.30 | -2.00 | 0.92 |
| 5 | M 5-160.98 | M 7-158.50 | 1.54 | 0.90 |
| 6 | M 6-176.54 | M 8-170.20 | 3.59 | 0.61 |
| 7 | M 7-203.35 | M_10-198.40 | 2.43 | 0.73 |
| 8 | M 8-221.74 | M_13-214.50 | 3.27 | 0.88 |
| 9 | M 9-233.18 | M_14-226.10 | 3.04 | 0.96 |
| 10 | M_10-238.75 | M_15-233.90 | 2.03 | 0.90 |
| 11 | M_11-248.77 | M 16-244.20 | 1.84 | 0.86 |
| 12 | M_12-263.83 | M 19-260.70 | 1.19 | 0.64 |
| 13 | M_13-283.89 | M_23-278.90 | 1.76 | 0.88 |
| 14 | M_14-294.94 | M_24-289.80 | 1.74 | 0.88 |
| 15 | M 15-307.69 | M 26-302.10 | 1.82 | 0.87 |
| 16 | M_16-312.53 | M 28-305.70 | 2.19 | 0.88 |
| 17 | M 17-324.45 | M 31-317.60 | 2.11 | 0.92 |
| 18 | M 18-331.13 | M 32-324.60 | 1.97 | 0.85 |
| 19 | M_19-353.22 | M_39-346.30 | 1.96 | 0.88 |
| 20 | M_20-360.48 | M_40-353.70 | 1.88 | 0.88 |
| 21 | M 21-370.46 | M_43-365.30 | 1.39 | 0.84 |
| 22 | M_22-375.30 | M 44-368.00 | 1.95 | 0.85 |
| 23 | M_23-387.77 | M 47-381.60 | 1.59 | 0.75 |
| 24 | M 24-400.94 | M_52-395.80 | 1.28 | 0.80 |
), ArticleFig(id=1154016965610955012, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1154016884551836246, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| Biot 参数 | 座椅PU | 座椅蒙皮 |
| 孔隙率 $\phi$ | 0.939 | 0.952 |
| 流阻 $\sigma /\left( {\mathrm{{Pa}} \cdot \mathrm{s}/{\mathrm{m}}^{2}}\right)$ | 25 128 | 244 065 |
| 扭曲度 ${\alpha }_{\infty }$ | 1.440 | 3.296 |
| 粘特征长度VLE/μm | 70.0 | 40.6 |
| 热特征长度TLE/μm | 153 | 60.5 |
| 杨氏模量 $E/\mathrm{{kPa}}$ | 64.68 | 64.68 |
| 密度 $\rho /\left( {\mathrm{{kg}}/{\mathrm{m}}^{3}}\right)$ | 30.4 | 80.0 |
| 泊淞比 $\nu$ | 0.338 | 0.338 |
| 阻尼 $\eta$ | 0.113 | 0.113 |
), ArticleFig(id=1154016965669675269, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1154016884551836246, language=CN, label=表 2, caption=
座椅PU和蒙皮Biot参数, figureFileSmall=null, figureFileBig=null, tableContent=
| Biot 参数 | 座椅PU | 座椅蒙皮 |
| 孔隙率 $\phi$ | 0.939 | 0.952 |
| 流阻 $\sigma /\left( {\mathrm{{Pa}} \cdot \mathrm{s}/{\mathrm{m}}^{2}}\right)$ | 25 128 | 244 065 |
| 扭曲度 ${\alpha }_{\infty }$ | 1.440 | 3.296 |
| 粘特征长度VLE/μm | 70.0 | 40.6 |
| 热特征长度TLE/μm | 153 | 60.5 |
| 杨氏模量 $E/\mathrm{{kPa}}$ | 64.68 | 64.68 |
| 密度 $\rho /\left( {\mathrm{{kg}}/{\mathrm{m}}^{3}}\right)$ | 30.4 | 80.0 |
| 泊淞比 $\nu$ | 0.338 | 0.338 |
| 阻尼 $\eta$ | 0.113 | 0.113 |
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