【摘要】 讨论了缓慢变化外力作用下非简谐振子的能量随外力的变化规律，在此基础上研究了固体的热弹性效应．结果表明：当物体受张力时，非谐振子的能量会降低，释放能量，使固体温度降低；受较小的压力时，它的能量会增大，吸收能量，固体的温度升高更多还原

【Abstract】 The energy change principle of anharmonic vibrator with the aviation of outer force is discussed.And the thermal expansion effects of solid are studied.It can be seen that when substance is under the tensile force,the energy of anhamomic vibrator will reduce,that lead to the drop of solid temperature,when substance is under the small pressure,the energy will increase ,solid will absorb the energy,that load to the rise of the temperature.更多还原