柴油机卷簧扭振减振器力学模型和性质研究

STUDY ON MECHANICAL MODEL AND PROPERTIES OF SLEEVE SPRING-TYPE TORSIONAL VIBRATION DAMPER FOR DIESEL ENGINE

柴油机卷簧扭振减振器因具有较高的可靠性和优良的性能,常应用于大功率船用柴油机进行扭振减振作用。但因卷簧组属于叠曲梁大变形和非线性问题,其变形状态的描述、接触区域变化、周围空间对变形限制等,使得力学模型的研究变得非常复杂,至今还没有一个高效准确的减振器刚度参数计算方法。为此,研究卷簧减振器刚度计算模型,以叠曲梁弯曲模型为基础,充分考虑了簧片间接触和限位销对簧片的支撑和限位作用等复杂因素,建立了完整的减振器刚度力学模型和相关算法,开发了计算程序,并通过有限元分析的方法验证了模型的正确性。在此基础上,研究了减振器主要设计参数对力学性质的影响规律,为减振器的设计提供了依据。

Owning high reliability and excellent performance,sleeve spring-type torsional vibration dampers is often used in high-power marine diesel engine to reduce torsional vibration.However,since sleeve spring pack belongs to the large deformation and nonlinear problem of the superposed curved beam,the description of the deformation state,the change of the contact area and the limitation of the surrounding space on the deformation make the study of mechanical model very complicated.So far,there still isn’t an efficient and accurate computational method for the stiffness parameters.Therefore,the computational model of the stiffness for the dampers was studied.Based on the superposed curved beam bending models,these complex factors such as the contact between the springs,support and limit of stroke limiter were fully considered.A complete damper stiffness mechanics model and related algorithms were presented and program was made as well.Correctness of the model was verified by the method of finite element analysis.Based on this,the influence of the main design parameters of the damper on the mechanical properties was studied,which provided a basis for design of the damper.