活塞是柴油机最主要的零件之一,寻求活塞正确而可靠的设计与计算方法,是提高柴油机可靠性与寿命的重要途径。当柴油机工作时,由于活塞的热应力和热变形以及活塞第一道环槽温度过高导致活塞裂损、活塞环卡死、拉缸等现象。为了准确地确定活塞的热应力和热变形,必须首先确定活塞的温度场,由此才能再进一步对活塞结构进行优化设计。 Pistons are one of the most important parts of diesel engines. Seeking accurate and reliable design and calculation of pistons is an important way to improve the reliability and life span of diesel engines. When the diesel engine work, due to the thermal stress and thermal deformation of the piston and piston ring groove temperature is too high leading to the piston cracking, piston ring stuck, pulling cylinder and so on. In order to accurately determine the thermal stress and thermal deformation of the piston, the temperature field of the piston must first be determined so that the piston design can be further optimized.