2019年汽车噪声优化国际会议嘉宾演讲PPT资料合集.rar

1、ANSYS电机NVH分析及多物理场优化解决方案大纲 电驱动系统NVH分析的必要性与难点 ANSYS 电磁-震动-噪声分析流程 基于电磁和NVH性能的电机多物理场优化分析 电机噪声品质分析与声音设计 总结2电机NVH分析的必要性3 整车背景噪声低，电驱动系统NVH与噪声表现更突出 电驱动系统噪声频率高、频带窄，人感觉特别不舒服 电机、控制器、减速箱、空调等电机NVH分析的难点4 高度多物理场耦合 电磁场、控制器、结构场、声场 结构部件高度耦合 电机、控制器、减速器、驱动桥 运行工况复杂 稳定运行与加速工况 电机自身特点与工艺 铁芯叠片、绕组工艺、热套等 多物理场优化EmagSimulationS

2、tatorExcitationsDynamic behaviorAcousticradiationPropagation and transfer Path3D Sound&PerceptionSound simulation in real caror in driving simulatorANSYS 集成化电机VNH以及声音设计流程ANSYS Workbench平台下仿真流程Maxwell force transferMotor surface velocities transferInput parameter:Eccentricity&tiltOutput parameter:Max

3、 SPL at 1 mObjective:Design lighter(Mass 165 KG)and low noise(Minimize SPL at 1m)motorcasing by controlling motor&Geartrain housing tooth width and height as inputparameters(refer next slide)*Dummy model of reduction box*Courtesy:GRABCADGear transmission error based excitation典型仿真场景Maxwell model is

4、Interior Permanent magnet Synchronous MotorDynamic eccentricity of 0.2mm introduced in Rotor along with tilt of 0.15 degRotor face on which forces to be taken in HarmonicAssembly weightStatic and ModalLoads import from Maxwell on Stator ToothHarmonicLoads:50 to 1500 HzResolution:50 HzGear Excitation

5、 SpectrumGeometry and MeshingFixityElement size=/6AcousticFully reflective surfaceRadiation boundaryVelocity imported in Acoustic from structural harmonicBolt loadMBDGear transmission error based excitation prediction for gear whine noiseMaxwell 3D多物理场优化平台optiSlangDesignModelerMaxwellMechanicalw/Mec

6、h ParametricOptimetricsANSYS 电磁-震动-噪声分析流程 2019R29电机NVH分析流程1.Magnetic Field Solution2.Modal and Vibration3.AcousticFrequency HzRPMFrequency Hz4.VRxperienceANSYS 2019 R2 电机多转速 NVH 仿真流程不再基于ACT插件，完全自动化的分析流程 在 Maxwell 中对转速进行 DesignXplorer 参数化分析 多转速电磁力（集中力或分布力）自动导入 Mechanical/Harmonic Response 模块 自动进行多转速谐