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摘 要：某型工程車辆，在可靠性试验过程中，驱动桥桥壳若为冲焊结构，会经常从推力杆支座焊缝位置开裂，影响试验效率。对桥壳进行试验研究发现平衡悬架结构在搓衣板路上存在低频“拍击”附加力，并会引起簧上共振，使推力杆座焊缝位置的应力异常增大，容易产生裂纹。
关键词：驱动桥 平衡悬架 低频附加力 簧上共振
Experimental Study on Load Bearing Capacity of Drive Axle Housing
Xie Fan，Huang Zhiliang，Zhang Yunfei，Deng Xishu
Abstract：During the reliability test of a certain type of engineering structure， if the drive axle housing is a punching and welding structure， it will often crack from the weld position of thrust rod support， which affects the test efficiency. The experimental study on the axle housing shows that there is a low-frequency “slapping” additional force of the balanced suspension when running on the washboard， which causes the spring resonance and makes the stress of the thrust rod seat weld abnormal increase， and produce cracks easily.
Key words：drive axle， balanced suspension， low-frequency additional force， spring resonance
关键词：驱动桥 平衡悬架 低频附加力 簧上共振
Experimental Study on Load Bearing Capacity of Drive Axle Housing
Xie Fan，Huang Zhiliang，Zhang Yunfei，Deng Xishu
Abstract：During the reliability test of a certain type of engineering structure， if the drive axle housing is a punching and welding structure， it will often crack from the weld position of thrust rod support， which affects the test efficiency. The experimental study on the axle housing shows that there is a low-frequency “slapping” additional force of the balanced suspension when running on the washboard， which causes the spring resonance and makes the stress of the thrust rod seat weld abnormal increase， and produce cracks easily.
Key words：drive axle， balanced suspension， low-frequency additional force， spring resonance