During the overall scheme argumentation of new launch vehicles,structural coefficients of those with similar scale or same propellants are used for reference and then structural weight of launch vehicle segments are calculated.As the weight of tanks,shells and other segments is given according to proportionality coefficients,it is irrelevant with the loads on the structure,which can cause large differences in detailed iterative design,so that the scheme cannot be self-consistent and has to be done repeatedly.In order to expedite the overall design process,method of fast structural weight estimation is studied.A structural weight estimation digital module is build and embedded into the overall design platform,which estimate structural weight based on the loads and in the loop,so that the precision is much better and the required time is much fewer.By this method,the risk of redesign is smaller and the efficiency of overall argumentation is greatly im-proved.The structural weight estimation digital module also provides the function of overall scheme comparison and optimization and weight management of launch vehicles.It played a great role in scheme argumentation of new launch vehicles,and extended its application to other type of launch vehicles and other research phases.
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