| 黄硕.基于多体动力学仿真技术的多缸发动机噪声预测[J].汽车零部件,2014,8(1):36-41 |
| 基于多体动力学仿真技术的多缸发动机噪声预测 |
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| DOI： |
| 中文关键词: 多缸发动机 噪声 发动机动力总成 |
| 英文关键词: Multi cylinder engine Noise Engine powertrain |
| 基金项目: |
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| 摘要点击次数: 1531 |
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| 中文摘要: |
| 对一台四冲程直列四缸涡轮增压柴油发动机建模，使用多体耦合和有限元边界元来进行噪声辐射预测。对其进行多体动力学仿真，模拟这台发动机从1 500~4 000 r/min的工作状态，确定动力总成的激励大小，还特别估计出了作用在缸体上的作用力。在发动机动力系统的动态描述中，同时考虑气体压力对燃烧过程的影响和运动部件惯性力的作用。此外还评估了实际发动机的操作性能，曲柄和缸体都被视为自由体。依据ISO3744标准，基于著名的MATV方法，利用模态参与因子的缸体激励，计算出距发动机1m处的发动机噪声辐射大小。通过LMS VirtualLab工具，对发动机动力总成的动态及振动噪声表现进行描述。 |
| 英文摘要: |
| A model was built for a turbocharged 4 cylinder diesel engine prototype, and a coupled multi body and finite element analysis boundary element (FEM BEM) methodology were used to predict the noise radiated. A multi body dynamic simulation was done to simulate the engine working condition from 1 500 to 4 000 r/min, in order to determine the excitation force of the powetrain, and the forces acting on the cylinder block was estimated in particular. In dynamics description for the engine powertrain system, both the effects of the gas pressure during the combustion process and the inertia forces of the moving parts were taken into account. Moreover the real engine operating behavior was assessed, with both the crank and the block were considered as flexible bodies. Afterwards, the cylinder block excitations in terms of modal participation factors were used to evaluate the engine radiated noise at a distance of one meter away from the engine, based on the well know MATV methodology and according to the ISO 3744 standard. The dynamics of the engine powertrain and its vibration noise behavior were described using LMS Virtual.Lab tools. |
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