There are generally two solutions to practical engineering problems, 1 is simplified calculation, and 2 is numerical simulation. The two of them have some similarities. First of all, we should determine the research object, whether it is a building or a machine, establish the corresponding solid model, then determine the load, dynamic load or static load, and then choose the method. Since the development of mechanics, there are many methods to solve engineering problems, such as difference method for plane problems and finite element method for complex structures. There are many such softwares, just look them up. for reference only