条烟配送系统动力学仿真及可靠性分析

发布时间：2018-02-27 19:32

本文关键词： 笼车可靠性刚柔耦合有限元轻量化　出处：《湖南工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：装有条烟的笼车在配送过程中,由于运输环境中的冲击与振动可能会导致笼车在结构或功能方面的损坏,在笼车与车厢底板之间铺垫缓冲物是防止笼车因遭受路面激励作用而破损的主要抑振方法。目前,在缓冲包装动力学的研究中对减振关注较多,而对运输过程中的路面、车辆等其他复杂因素考虑较少。因此,本研究从系统角度综合考虑,建立了包含路面、笼车与缓冲物、汽车的整车运输系统,并对笼车可靠性进行了研究。首先,根据路面激励的分为随机路面激励和脉冲路面激励进行建模。采用正弦叠加法生成路面不平度模型,基于ADAMS软件中3D虚拟路面的建模原理,建立了用于运输平顺性仿真的3D随机虚拟路面,通过路面不平度的功率谱验证路面模型建立的合理性。其次,在对汽车运输系统进行建模时,一般都将其简化为弹簧阻尼系统模型,忽略了其复杂性,不能精确的模拟实际系统。本研究利用ADAMS软件建立汽车模型和有限元软件Hypermesh建立了缓冲物柔性体文件,将缓冲物柔性体与汽车和笼车进行刚柔耦合建模。根据汽车平顺性试验方法对整车运输系统进行了随机路面和脉冲路面下的平顺性仿真,通过加速度均方根评价不同车速下、不同路面等级对笼车运输的影响,并讨论了车速对缓冲物缓冲性能的影响。最后,利用有限元软件Abaqus对已有笼车进行模态和瞬态分析其可靠性,得出在保证运输可靠的前提下可以轻量化,再验证轻量化后的笼车运输过程可靠性。笼车的轻量化不仅减少制造成本,还能有效地降低物流配送过程的空载载荷和提高其运输效能,减小运输能耗。为优化笼车结构,提高运输效率提供了设计参考依据。
[Abstract]:In the course of distribution, the impact and vibration in the transport environment may lead to structural or functional damage of the cage car. The cushioning between the cage car and the bottom of the car is the main method to prevent the cage car from being damaged by the road surface excitation. At present, more attention is paid to the vibration reduction in the study of cushion packaging dynamics, but the road surface in the transportation process. Vehicle and other complex factors are less considered. Therefore, from the system point of view, this study establishes a vehicle transportation system including road surface, cage car and buffer, automobile, and studies the reliability of cage car. According to the road surface excitation can be divided into random road excitation and pulse road excitation to model the road surface unevenness model is generated by sinusoidal superposition method based on the modeling principle of 3D virtual pavement in ADAMS software. A 3D random virtual pavement for simulation of transport ride comfort is established, and the rationality of the road model is verified by the power spectrum of road roughness. Secondly, when the vehicle transportation system is modeled, Generally, it is simplified as a spring damping system model, and its complexity is neglected, so it can not accurately simulate the actual system. In this paper, the vehicle model is built by using ADAMS software and the flexible body file of buffer is established by finite element software Hypermesh. The rigid and flexible coupling modeling of flexible body of buffer with vehicle and cage car is carried out. According to the method of vehicle ride comfort test, the ride comfort of the whole vehicle transportation system is simulated under the random road surface and the pulse road surface, and the acceleration RMS is used to evaluate the ride comfort of the vehicle under different velocities. The influence of different pavement grade on cage car transportation is discussed, and the influence of speed on buffer buffer performance is discussed. Finally, the modal and transient reliability of existing cage car is analyzed by using finite element software Abaqus. It is concluded that under the premise of ensuring reliable transportation, it can be lightened, and then verified the reliability of the transportation process of the cage car after lightweight. The lightweight of the cage car not only reduces the manufacturing cost, It can also effectively reduce the no-load load and improve the transportation efficiency of the logistics distribution process and reduce the transportation energy consumption, which provides the design reference for optimizing the cage car structure and improving the transportation efficiency.
【学位授予单位】：湖南工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TS43

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