solidworks柴油机活塞设计及强度校核+图纸(2)

From the temperature field analysis of the piston, we can see that the highest temperature is located at the top of the piston。 The max-temperature is concentrated at the edge of the top of the piston head as the result of the concentration of thermal stress。 Through the analysis of the force and heating and thermal- mechanical coupling conditions on the piston, the distribution of stress and deformation of piston would be obtained。 The internal deformation of the piston is mainly caused by heat load。 Stress concentration is mainly caused by the mechanical load, distributed at one side close to the piston and the piston rod’s joint face and junction of oscillating cooling hole。 Under the action of impact load, the greater the preload of the piston is, the more significant the fatigue life is。 Therefore, it is necessary to determine the stress concentration of the piston when the piston is subjected to

thermal-mechanical coupling。 Close attention should be paid to the impacts on the piston’s working reliability due to the assembly clearance between the piston and the cylinder liner and bolt pretightening force, providing a strong basis for the further optimization design of diesel engine。

Keywords: Diesel Engine Piston; finite element; thermal-mechanical coupling; stress; temperature field

第一章绪论 1

1。1 研究背景 1

1。2 柴油机优化设计的研究现状与发展 2

1。3 柴油机活塞优化设计的研究现状与发展 3

1。3。1 三维建模软件在柴油机设计中的应用 4

1。3。2 有限元分析软件在柴油机活塞校核中的应用 4

1。4 本文的主要内容 5

第二章柴油机活塞设计 7

2。1 柴油机活塞的工作条件、设计要求及材料选取 7

2。2 活塞的结构设计 8

2。2。1 活塞的主要尺寸 9

2。2。2 活塞头部设计 10

2。2。3 活塞销座 12

2。2。4 活塞裙部及其表面形状的设计 12

2。2。5 活塞与缸套的配合间隙 15

2。2。6 活塞重量 15

2。2。7 活塞强度计算 16

2。2。8 活塞的材料 16

2。3 活塞的冷却 16

2。3。1 冷却方式及效果 16

2。3。2 冷却油腔的制造方法 17

2。3。3 冷却机油的输送和输送机构 17

2。3。4 冷却油量的估算 17

2。4 小结 18

第三章柴油机活塞强度校核 19

3。1 机械负荷分析 19

3。2 热负荷分析 24

3。3 机械负荷与热负荷耦合分析 solidworks柴油机活塞设计及强度校核+图纸(2):http://www.youerw.com/jixie/lunwen_100418.html