摘要
建立某重卡驾驶室白车身的轻量化有限元模型,并对其进行了有效性验证。选取车身上有优化空间的钣金件作为设计区域,以设计区域质量最小作为优化目标。在保证车身刚度和模态性能指标的前提下,提出一种能量化性能指标对轻量化程度的单位质量灵敏度方法,用此方法优化钣金件的厚度大小并进行修正。最后,通过模态、刚度以及碰撞安全等性能指标验证优化后的数据。结果表明:轻量化后的驾驶室总质量降低了14.1 kg,所考察的性能均有所提高,满足设计要求,实现了对驾驶室白车身质量的优化,减少制造成本。
A finite element model of heavy truck cab was built for lightweight,and it was proved to be effective by test. The sheet metal parts of the heavy truck body with relatively optimal thickness were chosen as design area,the minimum mass of design area as optimization objectives. The sensitivity of unit mass which could quantize the degree of lightweight was proposed. Optimizing on the thickness of the sheet metal parts was meeting the requirements of stiffness and modal frequencies by this method,then the thickness sizes were fixed with the actual structure. Finally,the optimized data were verified through the modal,stiffness and collision safety performance indicators. The result shows that the total mass of the body is lightened 14. 1 kg,and the body performance is improved and meets the design requirements after lightweight.The optimization of the cab body mass is completed,and manufacturing cost is reduced.
出处
《汽车零部件》
2017年第9期8-13,共6页
Automobile Parts
关键词
重型卡车
白车身
轻量化
单位质量灵敏度
车身性能
Heavy truck
Body in white
Lightweight
Sensitivity of unit mass
Body performance
