The total fatigue life for welded structure is the sum.

二者寿命之和为焊接结构的总疲劳寿命.

So, it is the new method of researching welded structure fatigue damage process.

因此, 它是一种研究焊接结构疲劳损伤过程的新途径.

Low alloy high strength steel has been widely used in the welded structure because of its excellent performance and remarkable economic benefits.

低合金高强度钢由于性能优异和经济效益显著，在焊接结构中得到越来越广泛的应用。