A method of multiparameter load spectrum formulation for aeroengine is provides.Firstly

according to the loading condition of the engine component

a parameter is selected as the norm.Secondly

the biparameter tables from the initial multiparameter load-time histories are made.Thirdly

by performing a statistical analysis of biparameter table data

the dependency relationships and interval spaces among the parameters can be obtained

and the pseudo-parameters are determined.Fourthly

the pseudo-biparameter tables are deduced from the initial multiparameter load-time histories

and the marginal and conditional probability distributions of the concerned parameters can then be estimated.Finally

based on probability theory the joint probabilities of any parameter combinations are calculated.Using this method

the paper deals with the multiparameter load spectrum of a fighter engine

and provides the joint probabilities of the combination between three directional overload coefficients and the engine rotational speed.