基于多学科协同仿真的液压系统性能匹配研究

Matching performances for hydraulic system based on multi-disciplinary collaborative simulation

针对正铲挖掘机液压系统与工作装置负载的性能匹配问题,提出了多学科协同仿真方法,并应用于整机系统的性能仿真研究。为准确模拟挖掘机工作过程中各子系统的性能参数变化,基于多刚体动力学软件ADAMS建立了工作装置的机构仿真模型,并利用离散元仿真软件EDEM模拟了挖掘机不同进给深度的实际挖掘负载;然后,根据液压系统原理及控制方式,以AMESim为主仿真平台,建立了复合控制泵模型;最后,构建了全系统机液协同仿真模型。分别对液压系统工作过程中液压泵和各液压缸的性能参数进行了仿真验证,并模拟了不同挖掘负载对液压系统性能参数的影响变化。研究结果表明,该协同仿真方法能够用于对复杂系统进行准确、有效地建模,并验证了所设计的液压系统在多变负载工况下性能匹配参数的合理性。

Aiming at the performance matching problem between the working attachments and the hydraulic system of face-shovel hydraulic excavator,the multidisciplinary collaborative simulation method was proposed,and which was applied to performance studies of the whole engine system simulation.To accurately simulate the change to the performance parameter of each subsystem in the work process of the hydraulic excavator,the working attachment mechanism simulation model was built based on the multi-body dynamics simulation software ADAMS,and the modeling method of the digging resistance was put forward by using extended discrete element method （EDEM） software.Then,according to the hydraulic system principle and the control mode of the hydraulic excavator,the integrated simulation model,with the compound control pump,was established by using main simulation platform AMESim.Through the performance parameter of the hydraulic main pump and the hydraulic cylinder were validated in the whole operation cycle of the hydraulic excavator,the influence of the hydraulic system performance in different digging resistance load was analyzed.The results indicate that it is an effective and accurate method for modeling complex systems.And the rationality of the matching performance parameters of the designed hydraulic system is validated with the multidisciplinary collaborative simulation method.