基于静动态特性的偏置动量轮轮体结构优化

对最高转速7000 r/min的3N·m·s偏置动量轮轮体综合其静动态特性建立结构优化数学模型,进行优化设计.依据人工材料变密度法,对轮体进行三维静动态拓扑优化,得到趋于4根工字梁辐条结构的概念模型;并提出工字梁与矩形辐条两种模型,采用ANSYS零阶方法分别进行尺寸优化,所得体积均为1.51×10-4m3,但工字梁辐条轮体一阶弹性频率(1468.0 Hz)高于矩形辐条轮体(1413.5 Hz),结构更优,进而验证了拓扑优化结果的合理性.研究方法对减小设计质量、降低轮体振动水平等具有借鉴作用. 

Optimization of momentum-biased wheel rotor based on its static and dynamic properties

Mathematical models of structural optimization were established for a momentum-biased wheel rotor,by integrally considering its static and dynamic properties,while the structural optimization designs were carried out.The wheel's maximum rotation speed is 7000 r/min and maximum angular momentum is 3N·m·s.Three-dimensional static and dynamic solid topology optimizations on the wheel rotor were performed based on artificial material density method;then a conceptual model,which tends to be a model with 4 I-beam spokes,was gotten.Simultaneously,a rotor with 4 rectangular spokes was designed in contrast with the I-beam spoke rotor.Finally,parameter models were established in software ANSYS,and sizing optimization design was performed based on the zero-order method.The optimized results show that the volume of each rotor declines to 1.51×10^-4 m³,and that the first elastic vibration frequency(1468.0 Hz) of the rotor with I-beam spokes is higher than that(1 413.5 Hz) of the rectangular spoke rotor,proving that the result of topology optimization is reasonable.The optimized results in this article are realizable in engineering.And the study method provides a reference to decreasing design mass and lowering rotor's vibrant level,etc.