矿用车驾驶室ROPS侧向力学性能仿真与结构改进

Lateral Mechanical Performance Simulation and Improvement of ROPS of Mine Truck Cab

利用非线性有限元软件(LS-DYNA)对某矿用自卸车驾驶室翻车保护结构(Roll-over protective structure,ROPS)进行了侧向力学性能仿真分析并进行了结构改进。结果表明:原矿用车驾驶室ROPS在最小侧向载荷作用下已侵入挠曲极限区域(Deflection-limiting volume,DLV)8 mm,且最小能量吸收能力也未达到标准要求。根据仿真分析的结果对ROPS进行结构改进,改进后的ROPS在满足最小侧向载荷作用时,最大侧向位移减少了167 mm,最大侧向应力减少了225 MPa。同时,在满足最小能量吸收要求的条件下,ROPS未侵入DLV,安全性能达到了国家标准。

Lateral mechanical performances of a mine truck cab ROPS are simulated and analyzed by nonlinear finite element software （LS-DYNA） and structural improvement is made according to analysis results. The results show that ROPS of the origi- nal cab has already trespassed 8 mm into DLV under the minimum lateral load, and the minimum energy absorption does not reach the national standard either. Under the minimum lateral load after improvement based on analysis results, lateral displace- ment decreases by 167 mm and lateral stress reduces by 225 MPa. ROPS doesn＇t invade into DLV when it meets the minimum energy absorption requirement and safety performances, reaching the national standard.