光纤布拉格光栅（FBG）应变传感器的应变传递影响因素决定了其在监测结构应变时的准确性。为了研究FBG应变传感器的应变传递影响因素，建立了传感器应变传递力学模型，并进行应变传递的理论推导，得到该传感器的应变传递率。为了保证计算正确，对传感器的特殊结构进行了有限元仿真计算。此外，还分析了传感器的应变传递影响因素及其影响效果，并用有限元仿真对不同的影响因素进行了计算，验证了理论推导的准确性。

The strain transfer of fiber Bragg grating (FBG) strain sensor determines its accuracy when monitoring the structural strain. To study the influencing factors of strain transfer of FBG strain sensor, the mechanical model of the sensor strain transfer is developed in this paper. The theoretical derivation of the strain transfer is conducted, and the formula of strain transfer rate of the sensor is obtained. Meanwhile, to ensure proper computation the finite element simulation and calculation are performed for its special structure. Furthermore, the influencing factors and effects of the strain transfer of the sensor are analyzed, and different influencing factors are simulated using the finite element simulation, which verifies the accuracy of the theoretical derivation.