The analytical expression for calculation of temperature in piezoactuator and on its surface with an account of the distributed heat generation has been obtained. It has been experimentally demonstrated that the temperature in the centre of the actuator is higher than that one on the surface for 10-40°C and has reached 50-140°C, when the specific load was 50-100 W/cm. This shows that 25-45% of the input energy transforms into heat. The electrical breakdown and delamination of passive ceramic layers were the main reasons for failure of the actuators.
Получено аналитическое выражение для расчета температуры внутри и на поверхности пьезоэлемента с учетом распределенного тепловыделения. Экспериментально показано, что температура в центре актюатора выше температуры на поверхности на 10-40 °С и достигает значений