附加粘弹性阻尼齿轮结构的阻尼计算

COMPUTATION OF VISCOELASTICAL DAMPING STRUCTURE ATTACHED TO GEARS

本文结合模态应变能理论与２０节点有限元方法，提出了一种附加粘弹性阻尼结构损耗因子的计算模型和方法。以某实际齿轮附加阻尼结构为例，进行阻尼计算，研究了如何提高阻尼处理的效率，并得到相应实验的验证。该方法克服了已有粘弹性阻尼结构计算方法只能对简单理想结构建模的局限性，能够简便有效地应用于实际粘弹性阻尼结构的阻尼预测和优化。这对阻尼的工程应用具有较大的理论和应用价值。

A computational method is developed to solve engineering problems for the viscoelastical damping structure attached to gears,and a simple model is setup by combining 20-node element technique according to the modal strain energy theory.Thus,a practical and simple approach for engineering application is provided to predict loss factors and optimal location of damping layer in the structure without the difficulty of solving complex eigenvalues.As an example,the loss factors and optimal damping location have been calculated for a real gear.The results are in a good agreement with its experimental data.