学术
摘 要:
采用拓扑优化和形状优化相结合的集成优化方法,研究了结构优化方法在发动机气缸体轻量化设计中的应用.拓扑优化采用变密度方法,以缸体总柔度最小化为优化目标,以缸体重量为约束条件;应用形状优化对曲轴箱两侧壁面的厚度进行优化,以减重为优化目标,以最大应力不超过原缸体应力为约束条件.在最大爆发压力工况下优化后的缸体最大应力比原缸体低,应力分布更加均匀.结构优化方法应用于缸体的等强度轻量化设计,容易确定缸体的最佳形状,减少了重复设计验证的次数,可以大幅度缩短产品设计周期.[著者文摘]
文章出处:
《浙江大学学报：工学版》-2008年42卷2期 -224-228页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1008-973X（2008）02-0224-05
Light-weight design of single cylinder engine block based on structure optimization
JIA Wei-xin, HAO Zhi-yong, XU Hong-mei （College of Mechanical and Energy Engineering, Zhejiang University, Hangzhou 310027, China）
Abstract:
An integrated method of topology optimization and shape optimization was presented to study the application of structure optimization to the light-weight design of engine block. Topology optimization adopts variable density method, taking the minimum compliances of the cylinder block as the objective and the mass as the constraint. Shape optimization was used to optimize the thickness of the cylinder wall, taking mass reduction as the objective and the maximum stress being below the original one as the constraint. The maximum stress of the optimized cylinder block at the load case of gas explosion was lower than the original one, and the stress distribution was more evenly. Consequently, structure optimization in the light-weight design can easily determine the shape of the cylinder block, and decrease the repetition of design and validation.[著者文摘]
Key words:
cylinder block; topology optimization; shape optimization; light-weight design
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