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通过ＺＬ５０Ｃ后车架主梁由焊接槽钢改为热轧型钢的多种方案的静扭试验和有限元分析及应力测试的研究， 得出了合理性方案。
Through the static and torsional tests and the finite element analysis and the stress test of various schemes of ZL50C rear frame girder from welded channel steel to hot-rolled steel, the reasonable scheme is obtained.