履带车辆发动机悬置系统模态分析
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摘要
模态分析是研究系统动态特性的重要基础。为分析履带车辆发动机悬置系统的振动特性,在合理简化发动机悬置系统的基础上,推导了悬置系统的数学模型,并基于ADAMS环境建立其动力学模型,求解系统的固有频率、模态振型和各阶能量分布矩阵,并分析了系统各自由度耦合程度。对比发动机和路面的激励特征,结合系统的模态特性,分析系统振动匹配情况。结果表明:系统各方向均存在不同程度的耦合,其中z方向和绕z轴转动方向解耦度超过85%。悬置系统的固有频率避开了发动机激励频率,但车辆应减少在3.91～16.47 km/h车速下的行驶时间才能减少履带板激振频率所带来的共振影响。
Modal analysis is the important basis for studying the dynamic characteristics of the system. In order to analyze the vibration characteristics of the tracked vehicle engine mount system, based on reasonable simplification of the engine mount system, the mathematical model of the mount system is deduced. Based on ADAMS environment, the dynamic model is established. The system natural frequency, mode shape and the energy distribution matrix of each order are solved and the degrees of freedom coupling are analyzed. The excitation characteristics of the engine and the pavement are analyzed. Combining with the modal characteristics of the system, vibration matching of the system is analyzed. The results show that there are different degrees of coupling in all directions of the system, of which the decoupling degree of the direction of z and the direction of rotation around the z axis exceeds 85%. The natural frequency of suspension system avoids the excitation frequency of the engine, but the vehicle should reduce the travel time at the speed of(3.91~16.47) km/h, so as to reduce the resonance effect caused by vibration frequency of the track shoe.
Modal analysis is the important basis for studying the dynamic characteristics of the system. In order to analyze the vibration characteristics of the tracked vehicle engine mount system, based on reasonable simplification of the engine mount system, the mathematical model of the mount system is deduced. Based on ADAMS environment, the dynamic model is established. The system natural frequency, mode shape and the energy distribution matrix of each order are solved and the degrees of freedom coupling are analyzed. The excitation characteristics of the engine and the pavement are analyzed. Combining with the modal characteristics of the system, vibration matching of the system is analyzed. The results show that there are different degrees of coupling in all directions of the system, of which the decoupling degree of the direction of z and the direction of rotation around the z axis exceeds 85%. The natural frequency of suspension system avoids the excitation frequency of the engine, but the vehicle should reduce the travel time at the speed of(3.91~16.47) km/h, so as to reduce the resonance effect caused by vibration frequency of the track shoe.
引文
[1]王金杰,马彪,李和言.轻型履带装甲车辆动力传动总成悬置参数匹配研究[J].噪声与振动控制,2009,29(1):94-96.
[2]张保成,杜建红,张翼,等.坦克发动机悬置系统优化设计[J].华北工学院学报,1999(3):247-251.
[3]高普.车辆综合传动装置悬置系统振动解耦与优化设计[C].2016中国汽车工程学会年会论文集,2016.
[4]庄伟超,王良模,殷召平,等.基于遗传算法的混合动力汽车动力总成悬置系统的优化设计研究[J].振动与冲击,2015,34(8):209-213.
[5]周密,侯之超.基于遗传算法的动力总成悬置系统优化设计[J].汽车技术,2006(9):13-16.
[6]潘道远,高翔,夏长高,等.基于能量的汽车悬置系统与悬架系统模态耦合分析[J].机械科学与技术,2015,34(10):1626-1630.
[7]王楷焱,史文库,杨昌海,等.基于ADAMS的商用车驾驶室悬置系统的振动模态和传递特性[J].吉林大学学报:工学版,2010,40(2):330-334.
[8]闻邦椿,刘树英,陈照波.机械振动理论及应用[M].北京:高等教育出版社,2010.
[9]丁法乾.履带式装甲车辆悬挂系统动力学[M].北京:国防工业出版社,2004.
[10]杨金元,李福斌,陈树勋.发动机动力总成悬置系统模态分析与优化[J].装备制造技术,2014(2):16-19.
[2]张保成,杜建红,张翼,等.坦克发动机悬置系统优化设计[J].华北工学院学报,1999(3):247-251.
[3]高普.车辆综合传动装置悬置系统振动解耦与优化设计[C].2016中国汽车工程学会年会论文集,2016.
[4]庄伟超,王良模,殷召平,等.基于遗传算法的混合动力汽车动力总成悬置系统的优化设计研究[J].振动与冲击,2015,34(8):209-213.
[5]周密,侯之超.基于遗传算法的动力总成悬置系统优化设计[J].汽车技术,2006(9):13-16.
[6]潘道远,高翔,夏长高,等.基于能量的汽车悬置系统与悬架系统模态耦合分析[J].机械科学与技术,2015,34(10):1626-1630.
[7]王楷焱,史文库,杨昌海,等.基于ADAMS的商用车驾驶室悬置系统的振动模态和传递特性[J].吉林大学学报:工学版,2010,40(2):330-334.
[8]闻邦椿,刘树英,陈照波.机械振动理论及应用[M].北京:高等教育出版社,2010.
[9]丁法乾.履带式装甲车辆悬挂系统动力学[M].北京:国防工业出版社,2004.
[10]杨金元,李福斌,陈树勋.发动机动力总成悬置系统模态分析与优化[J].装备制造技术,2014(2):16-19.