引入传递矩阵法的复杂多体系统连接件建模方法研究

摘 要：以复杂系统动力学建模为研究背景，在计算多体系统动力学理论指导下，提出引入传递矩阵法模拟连接件的建模方法。以柴油机机脚螺栓为例使用该方法进行建模分析，结果表明引入传递矩阵法的复杂多体系统连接件建模和分析是可行的，在不失复杂系统整体动力学特性的前提下较精确地融入了连接件的传递特性，调谐了大零部件和小连接件间耦合建模时所建立矩阵的奇异性，具有求解速度快、模型数据量小等优点。文中的建模方法给建立柴油机整机振动与抗冲击快速评估模型奠定了一定基础。

Modeling of linkers in complex multibody system with transfer matrix method

On the basis of the theory of computational dynamics of multi-body systems,the transfer matrix was introduced to model the linkers in complex multi-body systems.As an example,the support bolt engine block was modeled and analyzed using the method proposed.The result shows that the modeling and analyzing method is feasible.On the premise of keeping the integral dynamics characteristics of complex systems unchanged and maintaining the linker’s transfer characteristic properly,the method has the advantages of fast speed in achieving solution and small data size in calculation.The modeling method gives a foundation to establish the rapid assessment model of integrative diesel’s vibration and impact.