关键词: 复合材料；结构件；振动试验；前挡泥板支架

Abstract: With the increasing application of composite materials in vehicle structural components, it is necessary to verify their vibration reliability. Considering the temperature sensitivity of resin matrix materials in composite materials, this study proposes a temperature based vibration testing method for vehicle structural components, which is more closely related to the actual environment of users and improves the accuracy of vibration fatigue testing for composite vehicle structural components. Taking the vibration fatigue test of composite material fender bracket as an example, the road load spectrum data of the fender bracket is first collected and preprocessed. Then, the ratio coefficient of empty and full load working conditions is introduced to calculate the acceleration random vibration spectrum of test bench. Then temperature based test bench vibration is carried out. Finally, the test results are evaluated using a combination of crack observation method, verticality detection method, and industrial CT three-dimensional scanning method, the test results are generally in line with the target specifications. The study demonstrates that the research findings can guide the implementation of vibration fatigue testing for composite vehicle structural components and facilitate the evaluation of test results.

Key words: composite material; structural components; vibration test; front fender bracket