XXXX 箱体有限元强度计算

XXXX箱体强度计算报告1建立有限元模型1.1三维模型的建立在ANSYSWorkbench中建立单个箱体的三维模型。其中为了计算方便，忽略螺栓、支撑板以及板材上的孔等结构；忽略各个模型的倒角、倒圆、拼接扣等不必要的结构。模型如图1所示。Geometry2015/7/2215:420.00 500.00 1000.00(mm)Geometry2015/7/2215:420.00 500.00 1000.00(mm)250.00 750.00图1箱体的力学计算模型1.2模型的力学性能参数一设置箱体的覆盖件板材为铝合金，支撑板为铸铝，其力学性能参数如图2所/示OPropertiesofOutlineRow3:AluminumAlloyABCDE1PropertyValueUnit2阿Density2.77E-06kgrrmnA-3□3□辰IsotropicSecantCoefficientofThermalExpansion4阿CoefficientofThermalExpansion2.3E-05CA1□5阿ReferenceT已mperature22c□6□阿IsotropicElasticity7DerivefromYoung'sModul...d8Young'sModulus71000MPa□9Poisson'sRatio0.33□10'BulkModulus69608MPa□11ShearModulus26692MPa□12□阿AternatingStressR-RatioTabular13InterpolatenSemi-Log d14Scale1□15Offset0MPa□16阿TensileYieldStrength280MPa□17阿CompressiveYieldStrength280MPa□18阿TensileUltirriateStrength310MPa□19阿CompressiveUltimateStrength0MPa□

PropertiesofOutineRow6:zlACDE1PropertyValueUnit蜃两2诃Density2.78E-06kgmnnA-3oo3□诃IsotropicElasticity□4DerivefromYoung'sModul...二|5Young'sModulus71000MPa□6Poisson'sRatio0.31o7BulkModulus62281MPa□8ShearModulus27099MPao9阿TensileYieldStrength250MPa□□10阿CompressiveYieldStrength250MPaoo11阿TensileUltimateStrength460MPa□□图2铝合金、铸铝的材料力学性能1.3模型的网格划分板材覆盖件设置为计算精度较高的结构化网格，而支撑件设置为有利于计算结果收敛的非结构化网格。控制网格划分的相关度：Relevance=100,控制网格尺寸大小为：Sizing=50mm。网格划分结果如图3所示，其中网格的节点数为:139874，单元数为:67670。250.00 750.00-StatisticsNodes139874Elements67670MeshMetricNone图3网格划分结果1.3约束与载荷根据技术协议对箱体结构要求：允许承受的均匀载荷为每延米1000N，在此载荷作用下不得产生塑性变形，箱体允许的最大集中载荷为850N（作用于最大跨度的对称中心处），最大相对挠度（跨度中心相对于箱体面挠度之差）不大于

5mm。由于支撑件固定于车厢的侧壁上，所以设置支撑件的固定孔为固定约束。箱体的上方由四个点固定于车厢的上壁，所以设置该位置Z轴的位移为0。箱体的载物面的面积约为1平方米，根据技术要求，设置该面上的均布力为1000N,如图4所示。B:StaticStructuralStaticStructuralTime:1.s遇Fix已油Support.Force:1000.N[C]Displacement0.00500.00 1000.00I遇Fix已油Support.Force:1000.N[C]Displacement0.00500.00 1000.00IZ250.00750.00图4箱体受均布载荷示意图同样根据技术要求，设置在支撑件中间的位置（跨距中心）设置集中载荷为850N,其余约束同上，如图5所示。A:StaticStructuralStaticStructuralTime:1.s2015/7/2216:25|~K|FixedSupportA:StaticStructuralStaticStructuralTime:1.s2015/7/2216:25|~K|FixedSupport[B]Displacement0Force:850.N0.00250.00500.00 1000.00Cmm'：iI750.00图5箱体受集中载荷示意图2计算结果分析2.1箱体承受均布载荷如图6、7为箱体整体变形与应力云图

B:StaticStructuralTotalD已formationB:StaticStructuralType:TotaIDeformationUnit:mmTime:12015/7/2215:440.14755Max0.131160.114760.0983670.0819730.0655780.0491840.0327890.0163950.00500.001000.00(mm)0Min0.00500.001000.00(mm)250.00750.00图6箱体变形云图0.00500.001000.00(mm)5.2916e-9MinZ750.000.00500.001000.00(mm)5.2916e-9MinZ750.00B:StatfcStructuralEquivalentStressType:Equivalent(von-MiUnit:MPaTime:12015/7/2215:445475Max4.86674.25843.653.04172.43341.8251.21670.60834250.00图7箱体应力云图如图8、9所示,为侧面支撑件的变形与应力云图B:StaticStructuralB:StaticStructuralTotalDeformation2Type:TotalDeformationUnit:mmTime:12015/7/2215:45TOC\o"1-5"\h\z12 訐.u0.021419MaxA JlW0.019039 ■0.016659 .0.014279 I0.0118990.00951940.00713960.00475970.00237990.00500.001000.00(mm)0Min0.00500.001000.00(mm)图8侧面支撑件的变形云图B:StaticStructuralEquivalentStress2Type:Equivalent(von-Mises)5tressUnit:MPaTime:1B:StaticStructuralEquivalentStress2Type:Equivalent(von-Mises)5tressUnit:MPaTime:12015/7/2215:460.00250.005.37ISMax4.77524.17863.5822.98542.38881.79211.19550.598930.0023156MinZ500.00(mm)125.00375.00图9侧面支撑件的应力云图如图10、11所示，为中间支撑件的变形与应力云图B:StaticStructuralTotalDeformation3Type:TotaIDeformationUnit:mm125.00375.00图9侧面支撑件的应力云图如图10、11所示，为中间支撑件的变形与应力云图B:StaticStructuralTotalDeformation3Type:TotaIDeformationUnit:mmTime:12015/7/2215:480.14755Max0.131170.11480.098420.0820420.0656650.0492880.0329110.0165340.0001567Min100.00 300.0U图10中间支撑件的变形云图B:StaticStructuralEqun/alentStress3Type:Equivalent(yon-Mises)StressUnit:MPaTime:12015/7/2215:473-9105Max3.4763.04152.6072.17251.7381.30350.868990.43455.2916e-9Min100.00 300.00Z图11中间支撑件的应力云图2.2箱体承受集中载荷0.00500.001000.00(mm)A:StaticStructural0.00500.001000.00(mm)TotalDeformationType:TotaIDeformationUnit:mmTime:12015/7/2216:260.20394Max0.181280.158620.1359&0.11330.0906420.0679820.0453210.022661750.000Min750.00250.00图12箱体变形云图0.00500.001000.00(mm)A:StaticStructural0.00500.001000.00(mm)EquivalentStressType:Equivalent(von-MiUnit:MPaTime:12015/7/2216:2783798Max7.44376.51765.58654.65543.72442.79331.86220.93109750.00Z1.7559e-8Min750.00Z250.00图13箱体应力云图A:StaticStructuralTotalDeformation2Type:TotalD已formationUnit:mmTime:12015/7/2216:27□0.030065Max0.026724—I0.023384—0.0200430.0167030.0133620.0100220.0066810.00334050Min0.00图14侧面支撑件的变形云图100.00300.00Z100.00300.00ZA:StaticStructuralEquivalentStress2Type:Equivalent(vori-Mises)StressUnit:MPaTime:12015/7/2216:287.3092Max6.49745.63564.87384.06213.25032.43851.62670.814930.0031493Min图15侧面支撑件的应力云图0.00 200.00 4CKJ.CKJ(mm)100.00 300.000.00 200.00 4CKJ.CKJ(mm)100.00 300.00A:StaticStructuralTotalDeformation3Type:TotalDeformationUnit:mmTime:12015/7/2216:290.11935Max0.106130.0929070.0796840.0664620.053240.0400170.0267950.0135720.00035003Min图16中间支撑件的变形云图0.00 200.00 400.00Cmm)100.00 300.000.00 200.00 400.00Cmm)100.00 300.00ZA:StaticStructuralEquivaI已ntSt「已3Typ已：Equivalent(yon-Mises)Stress