CAJ | 학술논문

论文采用有限元软件ANSYS ，分析了某型柴油机活塞的温度场和活塞热应力，并通过热-机械顺序耦合的方法，分析其综合应力场。研究结果表明：活塞温度最高点位于燃烧室中心，最高温度低于材料的危险温度；活塞在热应力作用下的最大变形量未超过活塞与缸套的最大配合间隙，但第三道环槽的不圆度达到0．08mm ，对活塞的润滑和密封有一定影响；热-机械耦合作用下，活塞应力最大值位于销座与销孔接触面上以及销孔上方销座内侧，可考虑在活塞颈部与活塞销座之间设置加强肋以提高销座的实际承载能力。
논문채용유한원연건ANSYS ，분석료모형시유궤활새적온도장화활새열응력，병통과열-궤계순서우합적방법，분석기종합응력장。연구결과표명：활새온도최고점위우연소실중심，최고온도저우재료적위험온도；활새재열응력작용하적최대변형량미초과활새여항투적최대배합간극，단제삼도배조적불원도체도0．08mm ，대활새적윤활화밀봉유일정영향；열-궤계우합작용하，활새응력최대치위우소좌여소공접촉면상이급소공상방소좌내측，가고필재활새경부여활새소좌지간설치가강륵이제고소좌적실제승재능력。
The paper analyzed the temperature field and the thermal stress field of a diesel engine piston with finite ele-ment analysis software ANASYS ,then used the thermal-mechanism indirect coupled method ,researched the coupled stress field of piston .The result indicated that the point of the highest temperature located on the middle of firebox which under the dangerous temperature of the material ;under thermal stress effect ,the maximum displacement of the piston did not exceed the clearance between piston and cylinder liner ,but the non-roundness at the third ring reached 0 .08mm ,which had some in-fluence on the airproof and lubricate of piston ;under thermal-mechanism coupled effect ,the point of maximum stress located on the interface of the seat of the pin and the pin hole ,so as the top on the pin hole and inner on the seat of pin ,so it was recommended to set rib between cervix and the seat of pin of piston to enhance the practical carrying capacity of the seat of the pin .