基于层次分析法的排气系统悬挂点位置优化
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重庆大学机械传动国家重点实验室,重庆大学机械传动国家重点实验室;汽车噪声振动和安全技术国家重点实验室

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中图法分类号 U462.2 文献标志码 A

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国家863计划资助项目(2012AA111803)


Optimization of Exhaust Hangers’ Location Layout by AnalyticHierarchy Process(AHP)
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the State Key Laboratory of Mechanical Transmissions,Chongqing university; the State Key Laboratory of Vehicle NVH and Safety Technology

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    摘要:

    提出一种基于层次分析法的排气系统悬挂点位置优化方法,以某桥车悬挂点位置为例,利用HYPERMESH建立排气系统的有限元模型,通过对排气系统进行数值模态分析和试验模态分析,验证有限元模型的准确性。首先通过层次分析法计算各阶模态振型的权重因子,然后用平均驱动自由度位移法(ADDOFD)对所有潜在悬挂点的各阶模态振型加权求和,重新选加权位移较小的位置作为排气系统的悬挂位置。为检验所设计悬挂位置的合理性,对该排气系统进行频率响应分析和约束模态分析,并进行实车验证。比较优化方案和初始方案,传递到车身的力明显下降,满足最大力小于10N的要求;车内座椅导轨的振动也明显减小,证明优化后的悬挂点符合要求。

    Abstract:

    An optimization method about layout of exhaust hangers location was presented by analytic hierarchy process(AHP). Based on the exhaust hangers location of a vehicle, its finite element analysis modal was established by HYPERMESH. Then the numerical modal analysis and experimental modal analysis was carried out, which verified the reasonability of the finite element analysis modal. Firstly, the weight of each order modal shape was calculated by analytic hierarchy process (AHP), then each mode shapes of all reference points are weighted sum by average driving degree of freedom (ADDOFD). We reselect position having the smaller displacement (ADDOFD) as the hangers’ location. In order to verify the reasonableness of designed location, frequency response analysis, static analysis, constraint modal analysis and real car verification were carried on the exhaust system. Compared with optimization scheme and initial scheme, the force delivered to vehicle body decreased obviously to meet the requirements of maximum force less than 10N and the vibration of seats rail also decreased obviously. The Results indicate that the optimization hanger layout meet requirement.

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王军,邓兆祥. 基于层次分析法的排气系统悬挂点位置优化[J]. 科学技术与工程, 2016, 16(25): .
WANG Jun, DENG Zhaoxiang. Optimization of Exhaust Hangers’ Location Layout by AnalyticHierarchy Process(AHP)[J]. Science Technology and Engineering,2016,16(25).

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  • 收稿日期:2016-05-02
  • 最后修改日期:2016-08-20
  • 录用日期:2016-06-03
  • 在线发布日期: 2016-09-09
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