液压挖掘机保护结构计算机仿真与实验
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摘要
液压挖掘机司机保护结构对于保证操作人员的安全是十分重要的,加装司机保护结构是国产挖掘机进入欧美市场的必要条件．为使挖掘机司机保护结构制造企业在设计阶段掌握产品性能,避免设计失误,采用动态模拟方法对挖掘机司机室顶部保护结构受落物冲击过程进行了仿真,对前保护结构进行了静态模拟．建立了保护结构的非线性有限元模型,讨论了接触算法和载荷施加方法,得出了顶保护结构受冲击点的位移时间历程曲线以及前保护结构在载荷下的位移和吸能曲线．在实验台上对该结构进行了试验,试验结果和仿真结果吻合较好．保护结构的仿真为结构设计提供了依据．
Operator guards of hydraulic excavators are very important to operator's security. The domestic excavators enter Occident market must be installed operator guards. Mastering product's performance and avoiding design failure, the impacting process of the top guard and loading process are simulated in this paper. The nonlinear finite element models of the operator guards are established. The contact arithmetic and loading method are discussed. The time-deformation curves of loading center are gained. The experiments are carried on the test equipment. The simulation results are accord well with the experiment ones. The simulation of the hydraulic excavators' operator guards provided the basis for the structural design.
Operator guards of hydraulic excavators are very important to operator's security. The domestic excavators enter Occident market must be installed operator guards. Mastering product's performance and avoiding design failure, the impacting process of the top guard and loading process are simulated in this paper. The nonlinear finite element models of the operator guards are established. The contact arithmetic and loading method are discussed. The time-deformation curves of loading center are gained. The experiments are carried on the test equipment. The simulation results are accord well with the experiment ones. The simulation of the hydraulic excavators' operator guards provided the basis for the structural design.
引文
[1]王国强,刘新岩,杨彬,等．液压挖掘机司机保护装置性能要求和试验方法[J]．建筑机械,2004(6):67-72．
[2]土方机械技术委员会．ISO10262:1998土方机械液压挖掘机保护结构的实验室试验和性能要求[S]//国家质量技术监督局．北京:中国标准出版社,1998．
[3]邵明亮,范文杰,陈向东,等．工程车辆FOPS受冲击板壳动态响应研究[J]．振动与冲击,2003,22(2):63-65．
[4]贡凯军．翻车和落物保护装置(ROPS&FOPS)性能试验和非线性设计理论研究[D]．长春:吉林工业大学,1995．
[5]土方机械技术委员会．ISO3164:1995土方机械保护结构的实验室鉴定挠曲极限量的规定[S]//国家质量技术监督局．北京:中国标准出版社,1995．
[6]易日．使用ANSYS6．1进行结构力学分析[M].北京:北京大学出版社,2002．
[7]黄辉．高柔塔-索-共结构体系震动性态分析[D]．南京:河海大学,2001．
[8]沃伯顿G B．结构的动力性态[M]．金咸定,戴宗信,译．北京:地震出版社,1983．
[2]土方机械技术委员会．ISO10262:1998土方机械液压挖掘机保护结构的实验室试验和性能要求[S]//国家质量技术监督局．北京:中国标准出版社,1998．
[3]邵明亮,范文杰,陈向东,等．工程车辆FOPS受冲击板壳动态响应研究[J]．振动与冲击,2003,22(2):63-65．
[4]贡凯军．翻车和落物保护装置(ROPS&FOPS)性能试验和非线性设计理论研究[D]．长春:吉林工业大学,1995．
[5]土方机械技术委员会．ISO3164:1995土方机械保护结构的实验室鉴定挠曲极限量的规定[S]//国家质量技术监督局．北京:中国标准出版社,1995．
[6]易日．使用ANSYS6．1进行结构力学分析[M].北京:北京大学出版社,2002．
[7]黄辉．高柔塔-索-共结构体系震动性态分析[D]．南京:河海大学,2001．
[8]沃伯顿G B．结构的动力性态[M]．金咸定,戴宗信,译．北京:地震出版社,1983．
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