Method of Equivalent Static Loads Based on Energy Principle and Its Application in Dynamic Optimization Design of Diesel Engine Piston

Abstract

Abstract:

Abstract： Aimed at the problem of illogical time critical point and large error of the method of equivalent static loads based on displacement in structural dynamic optimization, an equivalent static loads method based on energy principle was proposed which could identify the critical time of structure by getting the spectral element discrete solution space of the structure dynamic response. The mathematical model of equivalent transformation was proposed based on the energy at the critical time, and the optimum solution of the set of equivalent static load was obtained using the global optimization algorithm. Therefore, the dynamic optimization problem could be transformed into a static structure optimization problem and solved. Finally, the effective and engineering practicability of the proposed method was proven by the effective application of the method in dynamic optimization design of a diesel engine piston oil chamber structure. The results expand the scope of the theory of equivalent static loads, providing a new way for the dynamic response optimization design of a complex structure.

Key words: energy equivalent, equivalent static loads method, oil chamber of piston, dynamic optimization

CLC Number:

TH 122

ZHANG Yangang，MAO Huping，SU Tiexiong，DONG Xiaorui，WANG Ying，WANG Jun. Method of Equivalent Static Loads Based on Energy Principle and Its Application in Dynamic Optimization Design of Diesel Engine Piston[J]. Journal of Shanghai Jiaotong University, 2015, 49(09): 1293-1299.

References

［1］张俊红,张桂昌,何振鹏,等.燃烧压力下的活塞敲击力分析及活塞优化设计［J］.燃烧科学与技术,2013,19(2):128134.

Zhang Junhong, Zhang Guichang, He Zhenpeng, et al. Analysis of piston impinging force caused by combustion gas pressure and optimization design of piston ［J］. Journal of Combustion Science and Technology, 2013,19(2):128134.

［2］廖林清,屈翔,雷刚.基于多学科的活塞优化设计方法［J］.中国机械工程,2009,20(9):11231125.

Liao Linqing, Qu Xiang, Lei Gang. Multidisciplinary optimization for piston design ［J］. China Mechanical Engineering, 2009,20(9):11231125.

［3］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,2006,31(3):7680.

Huang Zhen, Zhang Jichun, 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, 2006,31(3):7680.

［4］杜发荣,张博.拓扑优化理论在活塞结构设计中的应用［J］.小型内燃机与摩托车，2007,36(5):14.

Du Farong, Zhang Bo. Application of topology optimization theory in the design of piston structure ［J］. Small Internal Combustion Engine and Vehicle Technique, 2007,36(5):14.

［5］高峰.TJ376Q活塞组件优化设计［J］.小型内燃机与摩托车,2003,32(1):912.

Gao Feng. Optimal design of piston assembly for TJ376Q engine ［J］. Small Internal Combustion Engine and Vehicle Technique, 2003,32(1):912.

［6］毛虎平，苏铁熊,李建军.多元模型自适应与时间谱元法结合的动态优化［J］.计算机辅助设计与图形学学报,2013,25(11):17251734.

Mao Huping, SU Tiexiong, Li Jianjun. The dynamic optimization based on combination of adaptive multimeta modeling and temporal spectral element method ［J］. Journal of ComputerAided Design ＆ Computer Graphics, 2013,25(11):17251734.

［7］毛虎平,吴义忠,李建军,等.时间谱元法在动态响应优化中的应用［J］.振动工程学报,2013,26(3):395403.

Mao Huping, Wu Yizhong, Li Jianjun, et al. Temporal spectral element method and its application in optimization of dynamic response ［J］. Journal of Vibration Engineering, 2013,26(3):395403.

［8］Kang ByungSoo, Park GyungJin, Arora Jasbir S. A review of optimization of structures subjected to transient loads［J］. Structural and Multidisciplinary Optimization, 2006,31(2): 8195.

［9］Kang B S., Choi W S, Park G J. Structural optimization under equivalent static loads transformed from dynamic loads based on displacement［J］. Computers and Structures, 2001,79:145154.

［10］Choi W S. Transformation of dynamic loads into equivalent static loads and structural optimization ［D］. Hanyang: Hanyang University, 2002.

［11］张艳岗,苏铁熊,毛虎平,等.动态应力解空间谱元离散的关键时间点识别方法［J］.机械工程学报,2014,50(5):8287.

Zhang Yangang, Su Tiexiong, Mao Huping, et al. Critical time points identification method for solution space of dynamic stress based on spectral element ［J］. Journal of Mechanical Engineering, 2014,50(5):8287.

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