1, E. A. Bender, Introduction to Mathematical Models, Zhu, translated, Science Popularization Press.
2. Ye Xiaoqi, editor-in-chief, teaching materials for college students' mathematical modeling competition (1), (2), (3) and (4), Hunan Education Press,
3. Zhou Yicang, etc. , Mathematical Modeling Experiment, Xi Jiaotong University Press
4. Cai Changfeng, Mathematical Model Modeling and Analysis, Science Press
There doesn't seem to be any professional counseling books in the mechanics competition. I haven't participated in it, and I'm not sure.
If you take part in this competition, your school should have special counseling materials and special intensive training.
I wish you good grades.