力学作为一门自然科学，从它诞生到发展的整个过程中，一直与工程实际有着密切的联系。一方面它的理论和方法来自于工程实际，另一方面运角这些理论和方法又可以解决工程实际问题。同时，在解决实际问题的过程中，使力学进一步发展壮大，可以说在力学的基本学科里，到处都有工 As a natural science, mechanics has been closely linked with engineering practice from its birth to its development. On the one hand, its theory and methods come from actual engineering. On the other hand, these theories and methods of transport angle can solve practical engineering problems. At the same time, in the process of solving practical problems, the mechanics have been further developed. It can be said that in the basic disciplines of mechanics, there are workers everywhere.