Research on Static Test Verification Technology of the Connection Between APU and Fuselage of Civil Aircraft

This paper studies the static strength verification of the connection between APU and fuselage of large civil aircraft, which provides a verification method for the airworthiness verification of the connection between APU and fuselage. Based on the internal force analysis results of APU finite element, this paper selects the static test load, completes the design from the theoretical load to the test load, designs a set of APU dummy loading device to introduce the load to complete the static test. The finite element analysis model is verified by the test results. The verified finite element analysis, limit load and limit load static strength test are used to show the airworthiness compliance of the static strength of the connection between APU and fuselage.