基于近似模型的活塞抗疲劳优化分析设计
|
摘要
活塞在恶劣工作环境中极易发生疲劳破坏后导致变形和销座断裂,需要对其进行抗疲劳设计.以某内燃机活塞作为研究对象,结合CAD/CAE的集成技术,提出一种基于近似模型的活塞结构优化减重的方案.对活塞原模型进行CAD/CAE组合建模和有限元分析,求得优化所需要的约束条件;构建了基于近似模型的活塞优化设计模型;利用ISIGHT软件对优化模型进行仿真;经过优化,在不超过活塞材料的极限强度的情况下,活塞结构减重6.4%并提高了疲劳寿命,达到预定优化设计要求.
As the core of the internal combustion engine parts,piston easily prone to deformation and pin fracture after fatigue damage in the severe working environment.To solve the anti-fatigue analysis and optimization problems of the piston,the internal combustion engine piston is taken as the research object,combining CAD/CAE integration technology,the structure optimization weight loss plan which based on the approximate model is put forward.Using CAD/CAE technique to integrate modeling and finite element analysis for the original model of the piston;build the optimization design model based on the approximate model;and using ISIGHT software to simulate the model;after the optimization,the weight of piston structure decreases 6.4% and the fatigue life is improved in the case where the ultimate strength of the piston material is not exceeded,which means the design requirement is achieved.
As the core of the internal combustion engine parts,piston easily prone to deformation and pin fracture after fatigue damage in the severe working environment.To solve the anti-fatigue analysis and optimization problems of the piston,the internal combustion engine piston is taken as the research object,combining CAD/CAE integration technology,the structure optimization weight loss plan which based on the approximate model is put forward.Using CAD/CAE technique to integrate modeling and finite element analysis for the original model of the piston;build the optimization design model based on the approximate model;and using ISIGHT software to simulate the model;after the optimization,the weight of piston structure decreases 6.4% and the fatigue life is improved in the case where the ultimate strength of the piston material is not exceeded,which means the design requirement is achieved.
引文
[1]吕良恺,苏铁熊,杨琪.活塞抗疲劳研究现状及展望[J].汽车零部件,2012(1):71-75.LüLiang kai,Su Tiexiong,Yang Qi.The development and prospect of improving fatigue resistance of piston[J].Internal Combustion Engine&Parts,2012(1):71-75.(in Chinese)
[2]Morel T,Fort E,Blunberg P.Effect of insulation strategy and design parameters on diesel heat rejection and performance[J].SAE,1985,5(6):753-767.
[3]张卫正,薛剑青,吴思进,等.高升功率柴油机铸铁活塞的设计与计算分析[J].内燃机学报,1999,3(17):228-232.Zhang Weizheng,Xue Jianqing,Wu Sijin,et al.High power diesel engine design and calculation analysis of cast iron piston[J].Transactions of CSICE,1999,3(17):228-232.(in Chinese)
[4]张文孝,郭成璧.船舶柴油机活塞的热疲劳强度分析[J].内燃机学报,2000,3(18):258-262.Zhang Wenxiao,Guo Chengbi.Thermal fatigue strength analysis of ship diesel engine piston[J].Transactions of CSICE,2000,3(18):258-262.(in Chinese)
[5]陶孟章,刘永祥.汽油机活塞热力耦合强度分析[J].柴油机设计与制造,2007,4(15):25-28.Tao Mengzhang,Liu Yongxiang.Thermal coupling strength analysis of petrol engine piston[J].Design&Manufacture of Diesel Engine,2007,4(15):25-28.(in Chinese)
[6]王建平,胡定云,吴波.柴油机铝合金活塞疲劳寿命预测[J].机械设计与制造,2009,12:149-151.Wang Jianping,Hu Dingyun,Wu Bo.The fatigue life prediction for aluminium alloy piston of diesel engine[J].Machinery Design&Manufacture,2009,12:149-151.(in Chinese)
[7]赖菲.全钢活塞的热机耦合仿真分析及疲劳寿命预测[D].太原:中北大学,2015.
[8]韩东,胡磊,郑卫刚.基于ANSYS的柴油机活塞温度和热应力场仿真研究[J].起重运输机械,2015(5):73-76.Han Dong,Hu Lei,Zheng Weigang.The temperature and thermal stress field simulation results of diesel engine piston based on ANSYS[J].Hoisting and Conveying Machinery,2015(5):73-76.(in Chinese)
[9]苗伟驰.活塞结构强度有限元分析[D].济南:山东大学,2012.
[10]张勇.基于近似模型的汽车轻量化优化设计方法[D].长沙:湖南大学,2009.
[11]Mi Chengji,Gu Zhengqi,ZHANG Yong.Frame weight and anti-fatigue co-optimization of a mining dump truck based on Kriging approximation model[J].Engineering Failure Analysis,2016,03:99-109.
[12]吴宗谕,罗文彩.基于空间分解的参数优化径向基函数近似模型构造方法[J].计算机应用,2015(1):179-182.Wu Zongyu,Luo Wencai.Construction method of radial basis function approximation model based on parameter optimization of space decomposition[J].Journal of Computer Applications,2015(1):179-182.(in Chinese)
[13]卢健钊,方伟,殷国富.基于近似模型的结构动静态多目标集成优化[J].机械设计与研究,2014(6):180-185.Lu Jianzhao,Fang Wei,Yin Guofu.Structural dynamic and static multi-objective integrated optimization based on approximation[J].Machine Design&Research,2014(6):180-185.(in Chinese)
[14]黄震,张继春,徐斌,等.基于有限元的活塞优化设计分析[J].昆明理工大学学报(理工版),2006(3):76-80.Huang Zhen,Zhang Jichun,Xu Bin,et al.Analysis of piston optimization design based on finite element analysis[J].Journal of Kunming University of Science and Technology(Science and Technology),2006(3):76-80.(in Chinese)
[2]Morel T,Fort E,Blunberg P.Effect of insulation strategy and design parameters on diesel heat rejection and performance[J].SAE,1985,5(6):753-767.
[3]张卫正,薛剑青,吴思进,等.高升功率柴油机铸铁活塞的设计与计算分析[J].内燃机学报,1999,3(17):228-232.Zhang Weizheng,Xue Jianqing,Wu Sijin,et al.High power diesel engine design and calculation analysis of cast iron piston[J].Transactions of CSICE,1999,3(17):228-232.(in Chinese)
[4]张文孝,郭成璧.船舶柴油机活塞的热疲劳强度分析[J].内燃机学报,2000,3(18):258-262.Zhang Wenxiao,Guo Chengbi.Thermal fatigue strength analysis of ship diesel engine piston[J].Transactions of CSICE,2000,3(18):258-262.(in Chinese)
[5]陶孟章,刘永祥.汽油机活塞热力耦合强度分析[J].柴油机设计与制造,2007,4(15):25-28.Tao Mengzhang,Liu Yongxiang.Thermal coupling strength analysis of petrol engine piston[J].Design&Manufacture of Diesel Engine,2007,4(15):25-28.(in Chinese)
[6]王建平,胡定云,吴波.柴油机铝合金活塞疲劳寿命预测[J].机械设计与制造,2009,12:149-151.Wang Jianping,Hu Dingyun,Wu Bo.The fatigue life prediction for aluminium alloy piston of diesel engine[J].Machinery Design&Manufacture,2009,12:149-151.(in Chinese)
[7]赖菲.全钢活塞的热机耦合仿真分析及疲劳寿命预测[D].太原:中北大学,2015.
[8]韩东,胡磊,郑卫刚.基于ANSYS的柴油机活塞温度和热应力场仿真研究[J].起重运输机械,2015(5):73-76.Han Dong,Hu Lei,Zheng Weigang.The temperature and thermal stress field simulation results of diesel engine piston based on ANSYS[J].Hoisting and Conveying Machinery,2015(5):73-76.(in Chinese)
[9]苗伟驰.活塞结构强度有限元分析[D].济南:山东大学,2012.
[10]张勇.基于近似模型的汽车轻量化优化设计方法[D].长沙:湖南大学,2009.
[11]Mi Chengji,Gu Zhengqi,ZHANG Yong.Frame weight and anti-fatigue co-optimization of a mining dump truck based on Kriging approximation model[J].Engineering Failure Analysis,2016,03:99-109.
[12]吴宗谕,罗文彩.基于空间分解的参数优化径向基函数近似模型构造方法[J].计算机应用,2015(1):179-182.Wu Zongyu,Luo Wencai.Construction method of radial basis function approximation model based on parameter optimization of space decomposition[J].Journal of Computer Applications,2015(1):179-182.(in Chinese)
[13]卢健钊,方伟,殷国富.基于近似模型的结构动静态多目标集成优化[J].机械设计与研究,2014(6):180-185.Lu Jianzhao,Fang Wei,Yin Guofu.Structural dynamic and static multi-objective integrated optimization based on approximation[J].Machine Design&Research,2014(6):180-185.(in Chinese)
[14]黄震,张继春,徐斌,等.基于有限元的活塞优化设计分析[J].昆明理工大学学报(理工版),2006(3):76-80.Huang Zhen,Zhang Jichun,Xu Bin,et al.Analysis of piston optimization design based on finite element analysis[J].Journal of Kunming University of Science and Technology(Science and Technology),2006(3):76-80.(in Chinese)