The structural reliability of the full-scale prototype can be evaluated in detail through mechanical property tests under various working conditions.However,this method is often constrained by various factors such as test environ-ment and test cost.Therefore,based on the performance requirements of the full-scale prototype,establishing a scaled model with structural mechanical similarity to replace the full-scale prototype for relevant processing and mechanical performance verification is currently a universal and operable method.This article conducts a detailed structural mechanical analysis based on the tensile and pressure bearing performance requirements of a full-scale prototype of a composite canister launch-er.And it is proposed to obtain the load conditions of the scaled model based on the average stress of the full-scale prototype and its connecting structure under different working conditions being equal to the average stress of the corresponding parts of the scaled model.Furthermore,the stress and its distribution of the scaled model under relevant working conditions are cal-culated using the finite element method.Based on the result,the safety margin of the full-scale prototype of the composite canister launcher is predicted,which provides theoretical guidance for further mechanical testing of the scaled model and the design of the formal prototype of the canister launcher.
维普
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