一台ZL30型装载机在前期的售后反馈中,经常有整机振动偏大和发动机右后地脚螺栓断裂的现象。开始怀疑是螺栓质量差及强度等级不够,但更换强度等级更高的螺栓后并没有解决问题。后来针对共振以及螺栓断裂较为严重的现象进行了全面系统的分析,发现以下问题:(1)当时的这台装载机有减振器,但是减振器的布置方向不同(见图1)。从减振器的应用讲,理想的布置应该是同方向、 A ZL30 loader in the pre-sale feedback, the machine is often too large vibration and the right rear anchor bolts broken phenomenon. Initially it was suspected that the quality of the bolts was poor and the strength level was insufficient, but the replacement of bolts of higher strength did not solve the problem. Later, a comprehensive and systematic analysis was conducted on the phenomena of resonance and bolt breakage. The following problems were found: (1) At this time, the loader had a shock absorber but the shock absorber was arranged in different directions (see FIG. 1). From the shock absorber application, the ideal layout should be the same direction,