乘用车排气净化器频响分析方法
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摘要
基于发动机试验和频响分析,以某乘用车排气净化器为例,研究振动强度的评价方法,考虑排气高温对结构强度的影响,选择频响分析的位移和应力作为验证和评价的指标,分析获得的出气法兰峰值加速度与试验结果具有很好的一致性。上、下蚌壳焊缝处为净化器结构的高风险区域,该区域的应力水平是决定净化器结构强度的关键指标。研究结果认为:在分析采用的载荷和温度输入条件下,该净化器结构强度满足可靠性要求。
Based on engine test and frequency response analysis, taking a passenger car exhaust converter as an example,the evaluation method for vibration intensity is studied considering the effect of high temperature of exhaust gas on structural strength. The displacement and stress obtained by frequency response analysis are selected as indicators for verification and evaluation. The peak acceleration of the outlet flange obtained from the analysis agrees well with the test results. The upper and lower welds of the clam shell are the high-risk areas of the converter structure. The stress level of this area is the key index to determine the structural strength of the converter. The results show that the structural strength of the converter meets the reliability requirements under the conditions of load and temperature input.
Based on engine test and frequency response analysis, taking a passenger car exhaust converter as an example,the evaluation method for vibration intensity is studied considering the effect of high temperature of exhaust gas on structural strength. The displacement and stress obtained by frequency response analysis are selected as indicators for verification and evaluation. The peak acceleration of the outlet flange obtained from the analysis agrees well with the test results. The upper and lower welds of the clam shell are the high-risk areas of the converter structure. The stress level of this area is the key index to determine the structural strength of the converter. The results show that the structural strength of the converter meets the reliability requirements under the conditions of load and temperature input.
引文
[1]田育耕,刘江华,王岩松,等.汽车排气系统振动模态分析及悬挂点优化[J].辽宁工程技术大学学报,2009,28(6):995-998.
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[7]刘志恩,胡雅倩,颜伏伍,等.发动机排气歧管热模态分析及试验研究[J].汽车工程,2015,37(3):359-365. DOI:10. 19562/j.chinasae. qcgc. 2015. 03. 019.
[8]胡国强,刘文元.基于Abaqus振动特征法在排气歧管故障分析中的应用[C]//中国内燃机学会2009年学术年会暨中小功率柴油机分会、基础件分会联合学术年会论文集.南宁:中国内燃机学会,2009.
[9]杨超,郑清平,张盼盼,等.基于模态分析的发动机排气歧管开裂问题研究[J].小型内燃机与车辆技术,2015,44(5):53-56. DOI:10. 3969/j. issn. 1671-0630. 2015. 05. 011.
[10]杨万里,陈燕,邓小龙.乘用车排气系统模态分析数值模型研究[J].三峡大学学报,2005,27(4):345-347. DOI:10. 3969/j. issn.1672-948X. 2005. 04. 015.
[11]方勇,张建武.基于有限元的汽车排气系统模态分析[J].苏州市职业大学学报,2009,20(1):24-26. DOI:10. 16219/j. cnki. szxbzk.2009. 01. 006.
[2]陈礼,熊锐,张斌彧.基于HM的汽油发动机曲轴优化分析[J].广东工业大学学报,2011,28(3):73-76.
[3]欧阳天成,韦齐峰,黄锦成.重型货车车架模态分析与优化设计[J].装备制造技术,2012(4):19-21.
[4] USAN M, DE WECK O, WHITNEV D. Exhaust system manifold development enhancement through multi-attribute system designoptimization[C]//Collection of Technical Papers-AIAA/ASME/ASCE/AHS/ASC Structures,Structural Dynamics and Materials Conference,2005. DOI:10. 2514/6. 2005-2066.
[5]杨小东,李东晗,齐冬亮,等.乘用车排气系统吊钩位置优化[J].计算机辅助工程,2018,27(3):26-28. DOI:10. 13340/j. cae. 2018.03. 006.
[6]陈东兴,熊锐,吴坚,等.基于Abaqus的发动机排气歧管总成模态分析[J].广东工业大学学报,2013,30(2):103-106.
[7]刘志恩,胡雅倩,颜伏伍,等.发动机排气歧管热模态分析及试验研究[J].汽车工程,2015,37(3):359-365. DOI:10. 19562/j.chinasae. qcgc. 2015. 03. 019.
[8]胡国强,刘文元.基于Abaqus振动特征法在排气歧管故障分析中的应用[C]//中国内燃机学会2009年学术年会暨中小功率柴油机分会、基础件分会联合学术年会论文集.南宁:中国内燃机学会,2009.
[9]杨超,郑清平,张盼盼,等.基于模态分析的发动机排气歧管开裂问题研究[J].小型内燃机与车辆技术,2015,44(5):53-56. DOI:10. 3969/j. issn. 1671-0630. 2015. 05. 011.
[10]杨万里,陈燕,邓小龙.乘用车排气系统模态分析数值模型研究[J].三峡大学学报,2005,27(4):345-347. DOI:10. 3969/j. issn.1672-948X. 2005. 04. 015.
[11]方勇,张建武.基于有限元的汽车排气系统模态分析[J].苏州市职业大学学报,2009,20(1):24-26. DOI:10. 16219/j. cnki. szxbzk.2009. 01. 006.