Tooth profile modification and wear are unavoidable, even intentional tooth profile deviations. Both of them have a significant influence on gear mesh stiffness and quasi-static transmission error (QSTE). In this paper, to efficiently and accurately obtain the two internal excitations of spur gear pairs with the above two kinds of deviations together, improved analytical mesh stiffness and QSTE models are proposed. And the effects of corner contact and structure coupling are considered together to overcome the defect of previous works. By comparing with the results of the finite element method, the established models are verified. Through the models, the mesh stiffness and QSTE of the gear pairs with the tooth profile modification and wear simultaneously can be obtained. The results show that both of the two kinds of deviations have significant effects on the limit value and distribution of the mesh stiffness and QSTE. Besides, it can be found that there is a competition between tooth profile modification and wear, and the influence extent of wear is gradually increasing that eventually can override the modification effect. Moreover, wear can affect the selection of tooth profile modification.

不可避免地要改变齿形和磨损，甚至是故意的齿形偏差。它们都对齿轮啮合刚度和准静态传递误差（QSTE）产生重大影响。为了有效，准确地获得正齿轮副的两个内激励，同时具有上述两种偏差，提出了改进的解析啮合刚度和QSTE模型。同时考虑了角接触和结构耦合的影响，以克服现有技术的缺陷。通过与有限元方法的结果进行比较，验证了所建立的模型。通过这些模型，可以同时获得齿轮齿廓修正和磨损的齿轮副的啮合刚度和QSTE。结果表明，两种偏差都对网格刚度和QSTE的极限值和分布有显着影响。此外，可以发现在齿形的改变和磨损之间存在竞争，并且磨损的影响程度逐渐增加，最终可以超过改变效果。此外，磨损会影响齿形修改的选择。