全文总字数：17891字

1. 研究目的与意义（文献综述）

1. purpose and significance of the study

2. 研究的基本内容与方案

1. basic content and technical programme

（1）the finite element model of knuckle is established. the suspension model of double fork arm is measured in the catia, and the parameters of suspension kinematics (hard point coordinates, etc.), dynamics (centroid, moment of inertia) and so on are obtained. the multi-body dynamics model of double fork arm suspension is established in the adams/car. at the same time, according to the relevant parameters of the whole vehicle, three typical working conditions are selected for static load simulation, and the calculated grounding force is taken as input to obtain the load at the key hard points of the steering knuckle. by using the inertial release method, the finite element simulation is carried out in the ansys to obtain the strength analysis results.

（2） structural topology optimization of knuckle. the key problems of topology optimization are briefly described, the method of structural topology optimization modeling of knuckle is analyzed and introduced in detail, the main ideas and steps of knuckle optimization design are worked out, the multi-objective topology optimization of knuckle is carried out, the are analyzed after topology optimization, and some feasible suggestions for improving knuckle stress concentration are put forward..

3. 研究计划与安排

3、scheduling

1-2(week 18-19 of semester 7) determine the topic of graduation project, perfect the task book of graduation project (related parameters), data collection in and out of school

3(week 1 of semester 8) project conception ~ literature retrieval, completion of opening report

4. 参考文献（12篇以上）

4.reference

[1] r. lapovok,i. timokhina,p.w.j. mckenzie,r. o’donnell. processing and properties of ultrafine-grain aluminium alloy 6111 sheet[j]. journal of materials processing tech.,2007,200(1).