压力机基础有阻尼动力系数值的计算、地面振动传播.docx

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1、附录A压力机基础有阻尼动力系数ax值的计算A.0.1压力机属于冲击式机器，其振动荷载在动力分析时可采用脉冲函数来描述冲击作用；脉冲函数可采用后峰齿形、对称三角形、矩形脉冲、正弦半波、正矢脉冲等。脉冲函数的选用应以设备厂家提供的振动荷载资料或通过试验结果确定,当上述条件不能满足时。可根据压力机设备类型和工艺条件确定，选用方式按表A.0.1o表Ao1脉冲函数选用表名称函数时域特性冲击响应谱适用范围矩形Q01t热模锻起始阶段水平力FH,锻压阶段竖向力FVPW=ax(O0)O(其他情况)/012345正弦半波P.热模锻起始阶段力矩M摩擦螺旋竖向力FvP=,axsin(0幻O(其他情况)01234(,4

2、t正矢PjA热模锻起始阶段力矩M1P=O*(1cos/(Orro)(其他情况)，.01234；5Ot三角形P=(o2ax(1-7)(10)0(其他情况)OA4t热模锻起始阶段水平力FH012345后峰齿形p(t)=%”(0%):O(其他情况)心热模锻起始阶段竖向力Fv/3Wt5O1.:2:34Ot9tA.0.2压力机冲击荷载作用可按照现行国家标准建筑振动荷载标准GB/T51228执行；五种脉冲作用下的动力系数77max值，可按本标准附录第AO2条的规定采用。A.0.3当确定冲击扰力的脉冲函数类型后,基组的有阻尼动力系数ma（表A.0.3-1表AO3-5）,应按下列规定确定：1对于竖向有阻尼动力

3、系数&max，阻尼比。和固有周期几可取基组的竖向阻尼比:、固有周期Az。2对于水平回转耦合振动第一、第二振型有阻尼动力系数小max、为max确定时，阻尼比。和固有周期A可分别取基组的水平回转耦合振动第一、第二振型阻尼比彳皿、二溟、。町、M2、第一、第二振型固有周期61、Tn2。3基组竖向、水平向和回转向扰力或扰力矩脉冲时间船宜取相同值。表A.0.3-1后峰齿形脉冲的max值0.000.050.100.150.200.250.300.350.400.450.500.050.15680.14520.13520.12630.11840.11150.10520.09960.09440.08980.08

4、560.100.31070.28810.26810.25050.23500.22120.20870.19750.18740.17830.16980.150.45980.42610.39660.37080.34770.32730.30900.29240.27740.26390.25140.200.60120.55740.51890.48510.45510.42830.40450.38290.36330.34550.32940.250.73310.67960.63290.59190.55550.52290.49380.46760.44380.42230.40270.300.85300.79130.

5、73730.68960.64740.60990.57610.54570.51830.49330.47050.350.95950.89070.83030.77710.73010.68810.65040.61650.58590.55800.53250.401.05120.97650.91110.85350.80240.75700.71620.67940.64610.61580.58820.451.12671.04770.97870.91800.86410.81600.77290.73410.69890.66690.63770.501.18541.10401.03280.97020.91460.86

6、510.82060.78040.74410.71100.68070.551.22711.14501.07341.01030.95430.90430.85940.81890.78200.74850.71770.601.25161.17091.10051.03850.98340.93410.88980.84960.81310.77970.74900.651.25961.18251.11511.05561.00260.95520.91230.87340.83780.80520.77510.701.25211.18051.11791.06251.01290.96830.92790.89090.8569

7、0.82560.79650.000.050.100.150.200.250.300.350.400.450.500.751.23061.16671.11051.06051.01560.97480.93740.90300.87120.84150.81390.801.19711.14281.09461.05141.01200.97570.94210.91080.88140.85390.82790.851.15411.11111.07241.03681.00360.97250.94300.91500.88850.86320.83910.901.10451.07441.04601.01870.9923

8、0.96640.94130.91680.89310.87020.84810.951.05181.03551.01790.99910.97930.95890.93800.91700.89610.87550.85531.001.00000.99660.98780.97510.95970.94260.92430.90550.88640.86730.8484表A.0.3-2对称三角形脉冲的max值0.000.050.100.150.200.250.300.350.400.450.500.050.15680.14530.13520.12640.11850.11150.10530.09960.09450.

9、08990.08560.100.31160.28870.26880.25120.23560.22170.20920.19800.18790.17860.17020.150.46260.42870.39900.37290.34980.32910.31060.29400.27890.26520.25270.200.60790.56340.52440.49010.45970.43260.40830.38640.36660.34860.33210.250.74580.69120.64340.60130.56400.53070.50090.47410.44980.42770.40760.300.8747

10、0.81060.75460.70520.66150.62250.58760.55610.52760.50170.4781xf0.000.050.100.150.200.250.300.350.400.450.500.350.99310.92030.85670.80070.75110.70680.66720.63150.59920.56990.54310.401.09971.01910.94870.88670.83180.78290.73900.69950.66380.63140.60190.451.19341.10591.02950.96230.90280.84980.80230.75960.

11、72090.68580.65390.501.27321.18001.09851.02690.96350.90710.85670.81130.77030.73310.69920.551.33901.24111.15581.08081.01460.95560.90290.85550.81270.77390.73860.601.39191.29081.20271.12541.05700.99630.94200.89310.84910.80910.77270.651.43371.33051.24061.16171.09211.03010.97480.92510.88020.83950.80240.701.46571.36141.27061.19091.12061.05811.00220.95200.90670.86560.82810.751.48911.38451.29361.21381.14341.08081.02490.97460.92920.88800.85040.801.50491.40091.31051.2312