Simulated birdshot for bird impact resistance tests for aircrafts

Abstract

The invention relates to a simulated birdshot for bird impact resistance tests for aircrafts. The simulated birdshot is a regular cylinder structure with the length-diameter ratio equal to 2. The simulated birdshot for bird impact resistance tests for aircrafts consists of ingredients including water, gelatine, sodium carboxymethylcellulose and aluminum acetate basic, and the mass proportion of the ingredients is 80+ / -2:8+ / -1:2:1. As the main ingredients of the simulated birdshot are the gelatine and the water, the gelatine and the water do not pollute environments, sites can be cleaned conveniently after the tests, the environments are not polluted, and adverse effects to health of test staffs are avoided. The appearance of the simulated birdshot is guaranteed by a special mold, the standard birdshot which meets requirements of test standards can be manufactured, a manufacturing process is simple, and cost is low.

Description

technical field [0001] The invention relates to a simulated bird bomb applied to an aircraft anti-bird impact test. Background technique [0002] Bird strike is one of the main factors that threaten the safety of air transport. In order to ensure the flight safety of civil aircraft, the Aircraft Airworthiness Regulations stipulate that civil aircraft must be inspected before commercial operation, including the nose and windshield structure, wing leading edge, and tail leading edge. Anti-bird strike verification tests including structural components, and require specific parts to withstand bird strikes, and the aircraft can still safely return to the airport. At present, the method of bird impact test is to use the air cannon to launch bird bombs to hit the structural parts fixed on the test fixture. According to the standard, bird bombs are generally made of dead poultry. According to the requirements of the test conditions for the weight of bird bombs, corresponding The ch...

AI Technical Summary

Problems solved by technology

The speed of bird impact can generally reach hundreds of kilometers per hour. After the impact, the bird bombs shatter and splash. The test site needs to be cleaned up immediately after the test. However, the remaining bird meat is easy to breed bacteria and pollute the environment, threatening the health of the test personnel.

At the same time, the test standard requires that the birdball be made into a positive cylinder with an aspect ratio approximately equal to 2. Due to individual differences in poultry, basically the finished birdshot cannot meet the test standard’s requirements for the shape of the birdshot, resulting in repeated bird strike tests. Poor sex

Because the bird strike test is a destructive test, the cost of the test is extremely high. At present, the method of combining analysis and experiment is often used in the design of structural bird strike resistance. Poor reproducibility of bird strike tests using bird bombs makes it difficult to use test results to validate analytical methods and correct computational models