Method for gaining service life of helicopter drive system component

Abstract

The invention discloses a method for gaining the service life of a helicopter drive system component. Strain test points are determined on the helicopter drive system component to be tested, and estimation data of the service life of the helicopter drive system component to be tested are given; in the process of a ground combined test and a flight test, strain data are obtained from the strain test points; according to the ground combined test and the flight test of a helicopter to be tested under multiple states and multiple load conditions, a criterion for overhaul of the helicopter drive system component to be tested is determined; obtained actual measurement data of the helicopter drive system component are analyzed, and the condition that the strain values of all strain test points of the helicopter to be tested exceed a monitor limit value and a component accumulated fatigue damage value is monitored and analyzed in time; comparison and correction are carried out by combining the estimation data and the actual measurement data, and the service life value of the helicopter drive system component to be tested of the same type is obtained.

Description

technical field [0001] The invention relates to the technical field of helicopter component detection, in particular to a method for acquiring the service life of a helicopter transmission system component. Background technique [0002] The production of helicopter transmission system components used to be through the introduction of foreign technology or through testing and imitation, and the life value of the main components was directly provided by foreign technical data. In recent years, the helicopter transmission system has entered the road of independent design and independent production. It is very important to independently and accurately give the life value of the main components, which requires a lot of experiments and field use. In order to improve the safety of helicopters, many methods and technologies have been adopted at home and abroad, such as nominal stress method, structural detail fatigue rating method, local stress-strain method, high-cycle, low-cycle a...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for acquiring the service life of the components of the helicopter transmission system, to solve the problem of the complicated surface shape of the components of the helicopter transmission system, which makes it difficult to directly determine the load conditions of some parts, and the flight load and flight status are complex and changeable. None of the methods and technologies can ensure that there will be no failures during the flight, especially during the flight test. Neither domestic nor foreign can provide accurate life values ​​for the components that have not been finalized. This is undoubtedly a major hidden danger to flight safety; Damage situation, especially the technical problem that the specific weak link cannot be found in time and the exact source of the fault cannot be quickly found when a fault occurs

Images