Research On Safety And Economic Assessment Of Bird Strike Airworthiness Provisions For Civil Aircraft

Bird strikes cause not only aviation safety threats,but also huge economic losses.With the development of domestic civil aircraft in China,bird strike airworthiness approval and management becomes very important,and bird strike airworthiness provision is the base of which.Bird environment is the key factor which influences the provisions.Based on current situation that the bird strike airworthiness provisions in China mainly refer to FAA and the bird environment at home and abroad differs a lot,it is necessary to carry out safety and economic assessment of bird strike airworthiness provisions in China through collecting and analyzing the bird strike cases in China.Therefore,the research of this paper contents are as follows:(1)Firstly,contrast bird strike airworthiness provisions at home and aboard,and analyze the differences among these provisions.Carry out research on the bird strike cases in China and based on which,analyze the suitability of the existing bird strike airworthiness provisions and further shows the importance of doing research on the safety and economic assessment of the bird strike airworthiness provisions in China.(2)Secondly,according to the bird strike cases in China,carry out extraction and statistical analysis of bird impact energy information and based on which,realize the distribution fitting and parameter estimation.The validity of the fitting result has been verified,which provides important input for the following research.(3)Thirdly,according to the airworthiness safety objectives,the relation between the safety level and the bird strike resistance requirements of the provisions has been got from the perspective of bird strike injury severity and its probability based on the bird impact energy.Also,carry out safety assessment of the aircraft and tail bird strike provisions.(4)Finally,generate the probability of different repair classification according to the bird impact energy distribution and the bird strike simulation results of aircraft tail horizontal stabilizer leading edge.Also,analyze the maintenance tasks and cost caused by bird strike,and provide economic references for the modifications of bird strike airworthiness provisions and the design of the aircraft bird strike resistance structure.