Aiming at the problem of dynamical strength failure of single layer latticed shells under strong dynamical load such as seismic,based on the dissipated energy mechanism of single layer latticed shells,a double-control criterion of dynamical strength failure was constructed by linear combination of maximum displacement and plastic accumulative dissipated energy.

Discussion on the initial fracture toughness K_(IC)~(ini) in the double-K criterion;

the plastic volumetric-strain increment and the equivalent plastic strain increment under yield condition,the double shearing yield criterion is strictly deduced on the basis of plastic flow rule drawn from plastic flow rule of Drucker postulation.

Using the pattern of double-parameter failure criterion of building structures, based on numerical simulation results, a double-parameter criterion of dynamical strength failure is constructed by combination of maximum displacement and total strain energy into dynamical failure index to quantify the different level of dynamical strength failure for single-layer saddle-shaped reticular shells.

On the bans of mean generation function andcouple score criterion,a orthogonaliation selection and prediCtion model isdeveloped and used to simulate and predict long--term annual mean airtemperature and an-unal precipitation series.