| 识别运行状态下内燃机曲轴角振动模态参数的新方法 |
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| 引用本文： | 华春蓉,闫兵,董大伟,许明恒. 识别运行状态下内燃机曲轴角振动模态参数的新方法[J]. 内燃机工程, 2010, 31(1) |
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| 作者姓名： | 华春蓉 闫兵 董大伟 许明恒 |
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| 作者单位： | 西南交通大学,机械工程学院,成都,610031 |
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| 基金项目： | 西南交通大学青年教师科研起步项目(2008Q049) |
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| 摘 要： | 提出了基于停缸法识别运行状态内燃机曲轴角振动模态参数的一种新方法。基于线性叠加原理,将某缸单独工作引起的测点角振动表示成多个模态角振动的叠加,并推导出当曲轴在该缸的某谐次简谐力矩作用下发生某一种振型的振动时,此时测点角振动近似表现为该模态角振动。对某6240柴油机的仿真研究结果表明:利用停缸法得到的测点角振动位移频响曲线,可识别内燃机曲轴角振动第1、2阶模态参数(固有频率、阻尼比和振型),且各阶模态振型和固有频率与自由振动计算结果相当接近,最大误差仅为2%。
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| 关 键 词： | 内燃机 曲轴 角振动 模态 停缸法 |
A New Method for Identifying Angular Vibration Modal Parameters of IC Engine Crankshaft in Operating Condition |
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| HUA Chun-rong,YAN Bing,DONG Da-wei,XU Ming-heng. A New Method for Identifying Angular Vibration Modal Parameters of IC Engine Crankshaft in Operating Condition[J]. Chinese Internal Combustion Engine Engineering, 2010, 31(1) |
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| Authors: | HUA Chun-rong YAN Bing DONG Da-wei XU Ming-heng |
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| Affiliation: | College of Mechanical Engineering/a>;Southwest Jiaotong University/a>;Chengdu 610031/a>;China |
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| Abstract: | A new method for identifying the angular vibration modal parameters of IC engine crankshaft in operating condition was proposed.According to the linear superposition principle,the angular vibration of measuring point produced when a cylinder was operating separately,was expressed as the superposition of multi-mode angular vibration,and then it was derived that the angular vibration of measuring point could be considered as the mode angular vibration when the crankshaft resulted in a kind of mode angular vib... |
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| Keywords: | IC engine crankshaft angular vibration mode misfiring method |
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