南水北调与水利科技
南水北調與水利科技
남수북조여수리과기
SOUTH-TO-NORTH WATER
2014年
3期
99-103
,共5页
铸铁闸门%双向止水%ANSYS计算%应力%变形
鑄鐵閘門%雙嚮止水%ANSYS計算%應力%變形
주철갑문%쌍향지수%ANSYS계산%응력%변형
cast-iron-gate%two2way-water-sealing%ANSYS-analysis%stress%deformation
针对某一水利工程中使用的双向止水铸铁闸门,利用 AN SY S软件建立了三维有限元模型。在正、反向水头差均为10 m的工况下,采用传统的薄板强度理论计算方法与三维有限元法进行比较与分析,结果表明两种方法的计算结果存在较大差异,最大应力与变形的结果误差高达30%~50%,其中传统经验公式的计算结果相对保守,导致铸铁闸门的制造成本加大,特别是当反向水头作用下最大应力和变形不在同一位置时,更加凸现。研究发现,根据铸铁闸门材料自身抗压/抗拉强度以及闸门正/反向受力和变形的变化情况,来分析相关规范要求的强度与刚度允许值时,存在不足之处,因此本文对闸门布置型式和门体的截面尺寸提出优化方案,降低其制造成本。
針對某一水利工程中使用的雙嚮止水鑄鐵閘門,利用 AN SY S軟件建立瞭三維有限元模型。在正、反嚮水頭差均為10 m的工況下,採用傳統的薄闆彊度理論計算方法與三維有限元法進行比較與分析,結果錶明兩種方法的計算結果存在較大差異,最大應力與變形的結果誤差高達30%~50%,其中傳統經驗公式的計算結果相對保守,導緻鑄鐵閘門的製造成本加大,特彆是噹反嚮水頭作用下最大應力和變形不在同一位置時,更加凸現。研究髮現,根據鑄鐵閘門材料自身抗壓/抗拉彊度以及閘門正/反嚮受力和變形的變化情況,來分析相關規範要求的彊度與剛度允許值時,存在不足之處,因此本文對閘門佈置型式和門體的截麵呎吋提齣優化方案,降低其製造成本。
침대모일수리공정중사용적쌍향지수주철갑문,이용 AN SY S연건건립료삼유유한원모형。재정、반향수두차균위10 m적공황하,채용전통적박판강도이론계산방법여삼유유한원법진행비교여분석,결과표명량충방법적계산결과존재교대차이,최대응력여변형적결과오차고체30%~50%,기중전통경험공식적계산결과상대보수,도치주철갑문적제조성본가대,특별시당반향수두작용하최대응력화변형불재동일위치시,경가철현。연구발현,근거주철갑문재료자신항압/항랍강도이급갑문정/반향수력화변형적변화정황,래분석상관규범요구적강도여강도윤허치시,존재불족지처,인차본문대갑문포치형식화문체적절면척촌제출우화방안,강저기제조성본。
Athree2dimensionalfiniteelementmodelofcastirongateinahydraulicprojectwasdevelopedusingANSYSsoftware.Under the working conditions that the forward and reverse head difference was 10 m, the maximum stress and deformation were calculated and analyzedusing thethinplatetheoryandthree2dimensionalfiniteelementmethod.Theresultsshowedthattheerrorsofmaximumstress and deformation are as high as 30%~ 50% for the tw o methods. The calculation results obtained from the traditional empirical formula were more conservative, which can cause the increasing of manufacturing cost of cast iron gate, especially when the maximum stress and deformation w ere not at the same place under reverse head. There were deficiencies in analyzing the allowable stress intensity and stiff2 ness required by relative standards according to the compression/tensile strength of the cast iron gate material and the stress and de2 formation variations of gate under inverse/reverse force. In this paper, the optimization scheme of arrangement type and section size of the gate was proposed in order to reduce the manufacturing cost.