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装载机经常会在施工条件恶劣的工地工作,高低不平的路面给机器带来很大的冲击,局部地方因为冲击可能产生变形和损坏。按照传统的方法,在产品试制时,模拟装载机不同的作业工况,通过试验验证产品的强度及可靠性,验证产品的结构是否能满足使用要求,这种物理样机试验当然是最有效的验证方法,但是有时需要几轮样机试验,费用高,周期长。利用CAE分析手段,在产品的设计阶段,利用有限元NASTRAN和MSC Adams/View多体动力学软件建立装载机的多体动力学模型,通过在动力学分析模型上加入各种曲线函数来模拟路面对轮胎的激励,进行动力计算分析,很容易获得装载机在通过不平路面时各部件应力随时间的变化值,并将其计算结果与物理样机的测试结果进行对比,两者的结果比较一致。此方法在产品的设计开发阶段,能有效地减少物理样机的试验次数,同时为物理样机试验提供指导。
Loaders often work in harsh construction sites. Uneven pavements can have a significant impact on the machine, and may be deformed and damaged in some places due to impacts. According to the traditional method, when the product is being manufactured, simulating the different working conditions of the loader, verifying the strength and reliability of the product by testing and verifying whether the structure of the product can meet the requirement of use is of course the most effective verification of the physical prototype test Method, but sometimes requires a few rounds of prototype testing, high cost, long cycle. Using CAE analysis method, the multi-body dynamics model of loader was established by using the finite element method of NASTRAN and MSC Adams / View multi-body dynamics software in the design stage of the product. By adding various curve functions to the dynamic analysis model to simulate the road Facing the motivation of the tire, the dynamic calculation and analysis can easily obtain the stress value of each component over time when the loader passes the uneven road surface, and compare the calculated result with the test result of the physical prototype, the results of the two are consistent . This method can effectively reduce the number of physical prototype tests and provide guidance for physical prototype testing in the product design and development stage.