Research and application of lightweight technology for passenger car subframes

CAE analysis methods and procedures of structural optimization for passenger car subframes were setup based on multiple load cases strength analysis methods and topology optimization technology,by which the structural stiffness,strength and lightweight performances of several car subframes were evaluated and optimized.The practical application showed that the weak positions of subframes could be predicted very accurately by using multiple load cases strength analysis method,and were consistent with experimental results.By using topology optimization method,selecting the appropriate optimization parameters,the CAE procedures are not only available for finding a 15% weight loss design proposal meeting the manufacturing requirements in this paper,are also suitable for use in the concept design for a new model subframe.Study results have important practical significance on academic value and engineering.