某型3吨叉车结构有限元分析及减振研究
发布时间：2018-08-26 14:08
【摘要】：随着物流业的发展,叉车作为一种功能广泛、机动性强的物料搬运装卸设备,得到越来越广泛的应用。叉车行业也进入了一个较快的发展时期,叉车的研究和设计水平也不断提高。但是叉车工作过程中的振动和噪声问题突出,已经成为叉车设计和生产水平进一步提高的瓶颈。目前国内外对车辆振动和噪声制定的标准越来越严格,如何解决振动和噪声问题成了叉车行业存在和发展的关键因素。 本文以某型3吨叉车为研究对象,对其振动性能进行了探索性研究。按照本文分析的需要以及有限元的建模要求,把该型3吨叉车的整车结构划分为护顶架、车架、驱动桥、转向桥和门架起升装置等关键部件。在三维CAD软件Solidworks中建立各个关键部件实体模型,并导入有限元软件ANSYS系统形成有限元模型。 对叉车护顶架分别按照刚性连接和发动机盖板悬置两种方式进行了模态分析,得到了这些部件的固有频率和振型。对叉车门架起升装置按空载和满载两种工况进行模态分析,研究了货物对门架起升装置振动性能的影响。对驱动桥、转向桥和平衡重等进行了振动模态分析,本文认为这几个构件在整车分析中可以按梁或质量单元进行简化。 在ANSYS中,通过把各个关键部件进行组装和连接,得到了该型叉车整车模型。对整车模型进行了模态分析,得到了该型叉车整车的固有频率和振型。通过各个部件独立模态分析和整车模态分析的结果对比,研究了叉车主要结构部件的振型和频率等振动参数在组装成整车前后的变化以及它们的关系。 在模态分析的基础上采用模态叠加法对该型叉车整车进行了谐响应分析和受路面不平度激励的瞬态分析,分析了整车各个关键部件的振动情况。并根据这些分析结果对叉车的动态性能做了相应的分析评价。 通过对该型叉车的振动性能的综合研究分析,提出了提高该产品振动性能的改进措施及途径。
[Abstract]:With the development of logistics industry, forklift truck, as a kind of material handling equipment with wide function and strong mobility, has been more and more widely used. Forklift truck industry has also entered a relatively rapid development period, forklift research and design level is constantly improving. However, the vibration and noise problems of forklift truck have become a bottleneck to improve the design and production level of forklift truck. At present, the standards of vehicle vibration and noise are becoming more and more strict at home and abroad. How to solve the problem of vibration and noise has become a key factor for the existence and development of forklift truck industry. The vibration performance of a 3-ton forklift is studied in this paper. According to the need of this paper and the requirement of finite element modeling, the whole structure of the 3 ton forklift truck is divided into several key parts, such as roof guard, frame, drive axle, steering bridge and gantry hoisting device. The entity model of each key component is established in the 3D CAD software Solidworks, and the finite element model is formed by introducing the finite element software ANSYS system. The modal analysis of forklift roof support is carried out according to rigid connection and engine cover mount respectively. The natural frequency and vibration mode of these parts are obtained. The modal analysis of the hoisting device of the door frame of forklift truck is carried out under the two working conditions of no-load and full-load, and the influence of the cargo on the vibration performance of the hoisting device is studied. Vibration modal analysis of drive axle, steering bridge and balance weight is carried out. It is considered in this paper that these components can be simplified by beam or mass element in the whole vehicle analysis. In ANSYS, the model of forklift truck is obtained by assembling and connecting the key parts. The modal analysis of the whole vehicle model is carried out, and the natural frequency and vibration mode of the forklift truck are obtained. By comparing the results of the independent modal analysis of each component with the results of the modal analysis of the whole vehicle, the vibration parameters of the main structural components of the forklift before and after the assembly of the vehicle are studied, and the relationship between the vibration parameters and the vibration parameters of the main structural parts of the forklift is studied. On the basis of modal analysis, modal superposition method is used to analyze the harmonic response of the forklift truck and the transient analysis of the road roughness excitation, and the vibration of the key parts of the vehicle is analyzed. According to these results, the dynamic performance of forklift truck is evaluated. Through the comprehensive study and analysis of the vibration performance of the forklift truck, the improvement measures and ways to improve the vibration performance of the product are put forward.
【学位授予单位】：太原科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH242
本文编号：2205102
[Abstract]:With the development of logistics industry, forklift truck, as a kind of material handling equipment with wide function and strong mobility, has been more and more widely used. Forklift truck industry has also entered a relatively rapid development period, forklift research and design level is constantly improving. However, the vibration and noise problems of forklift truck have become a bottleneck to improve the design and production level of forklift truck. At present, the standards of vehicle vibration and noise are becoming more and more strict at home and abroad. How to solve the problem of vibration and noise has become a key factor for the existence and development of forklift truck industry. The vibration performance of a 3-ton forklift is studied in this paper. According to the need of this paper and the requirement of finite element modeling, the whole structure of the 3 ton forklift truck is divided into several key parts, such as roof guard, frame, drive axle, steering bridge and gantry hoisting device. The entity model of each key component is established in the 3D CAD software Solidworks, and the finite element model is formed by introducing the finite element software ANSYS system. The modal analysis of forklift roof support is carried out according to rigid connection and engine cover mount respectively. The natural frequency and vibration mode of these parts are obtained. The modal analysis of the hoisting device of the door frame of forklift truck is carried out under the two working conditions of no-load and full-load, and the influence of the cargo on the vibration performance of the hoisting device is studied. Vibration modal analysis of drive axle, steering bridge and balance weight is carried out. It is considered in this paper that these components can be simplified by beam or mass element in the whole vehicle analysis. In ANSYS, the model of forklift truck is obtained by assembling and connecting the key parts. The modal analysis of the whole vehicle model is carried out, and the natural frequency and vibration mode of the forklift truck are obtained. By comparing the results of the independent modal analysis of each component with the results of the modal analysis of the whole vehicle, the vibration parameters of the main structural components of the forklift before and after the assembly of the vehicle are studied, and the relationship between the vibration parameters and the vibration parameters of the main structural parts of the forklift is studied. On the basis of modal analysis, modal superposition method is used to analyze the harmonic response of the forklift truck and the transient analysis of the road roughness excitation, and the vibration of the key parts of the vehicle is analyzed. According to these results, the dynamic performance of forklift truck is evaluated. Through the comprehensive study and analysis of the vibration performance of the forklift truck, the improvement measures and ways to improve the vibration performance of the product are put forward.
【学位授予单位】：太原科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH242
【引证文献】
相关期刊论文 前2条
1 卫良保;曾龙修;;叉车车架有限元模态分析与结构改进[J];工程机械;2012年03期
2 卫良保;李甲;;叉车车架的动态特性与减振分析[J];建筑机械;2012年05期
相关硕士学位论文 前1条
1 周盼;叉车液力传动系统匹配研究[D];太原科技大学;2012年
，本文编号：2205102
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