By adjusting to prestress in longitudinal beams, the effect of the deflection on the transverse structure is reduced to a minimum level.As a result, the structure can get to be optimized.

• 再通过对纵梁预应力的调整，使各种计算工况下纵梁产生挠度对横向结构影响最小，从而达到结构优化的目的。