物理力学是一门新的力学分支。它是最近十几年来才逐步建立和发展起来的。我国力学家钱学森同志最先注意到建立这门学科的重要性,并在这方面作了不少工作。 力学原来是物理学中的一个研究方面,主要研究各种物体的宏观运动规律和性质。大约在二十世纪初。由于工业生产的发展,出现了象飞机、各种热力机械、水力工程、金属加工、巨大建筑等较复杂的工程技术,需要解决很多复杂的宏观力学问题。为了适应这一发展的需要,力学就逐渐地脱胎于物理学而成为独立的学科。一直到现在,它在各项工程技术中仍然发挥着很大的作用。 Physical mechanics is a new branch of mechanics. It has been gradually established and developed over the past decade or so. Comrade Qian Xuesen, a Chinese mechanist, first took note of the importance of establishing this discipline and made a lot of efforts in this regard. Mechanics was originally a research field in physics, mainly studying the macroscopic laws and properties of various objects. About the early twentieth century. Due to the development of industrial production, more complex engineering technologies such as airplanes, various thermomechanics, hydraulic engineering, metalworking and huge buildings have emerged, and many complicated macroscopic mechanical problems need to be solved. In order to meet the needs of this development, mechanics gradually emerge from physics and become an independent discipline. Until now, it still plays a big role in various engineering techniques.