Nonlinear valve train dynamics simulation with a distributed parameter model of valve springs
Nonlinear valve train dynamics simulation with a distributed parameter model of valve springs
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DOI：
10.1115/1.2817043
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发表时间：
1997-07-01
影响因子：
1.5
通讯作者：
Patterson, DJ
中科院分区：
文献类型：
--
作者：
Lee, J;Patterson, DJ
为了研究配气机构在大载荷下的振动特性，特别是大功率柴油机的振动特性，建立了配气机构动力学仿真模型。本研究开发的非线性多自由度模型使用的输入数据从运动学分析。气门弹簧被建模为分布参数系统而不是集中质量系统。各配气机构部件的刚度常数理论上作为非线性值获得。将弹簧运动的偏微分方程和其它部件的常微分方程视为集中质量系统，采用数值“时间步进”法同时求解，不需任何迭代。该模拟将各部件的弹性特性作为非线性处理，其结果比以往使用简单的线弹性模型的研究更准确。
A simulation model of valve train dynamics was developed in order to investigate the vibrational behavior of a valve train under heavy normal load, especially for heavy-duty diesel engines. The nonlinear multi-degree-of-freedom model developed for this study uses input data resulting from the kinematic analysis. The valve spring was modeled as a distributed parameter system rather than a lumped mass system. The stiffness constants of each valve train component were theoretically obtained as nonlinear values. The partial differential equation describing the motion of the spring and the ordinary differential equations for other components, which were considered as a lumped mass system, were solved simultaneously without any iterations by using the numerical ''Time Marching Step'' method. The results of this simulation, which treated the elastic characteristics of each component as nonlinear, were more accurate than the previous studies that used simple linear elastic models.