8334FREQ3卡 1)定义频率响应问题中频率集,通过指定两模态频率间的激励频率数 2)格式 FREQ3 SID TYP °E NEF LUSTER FREO3 20.0200.0 LINEAR Contents Set identification number. (Integer >O) Lower bound of modal frequency range in cycles per unit time. (Real >0.0) Upper bound of modal frequency range in cycles per unit time.( RealoO, F2 2F1, Default=F1) TYPE LINEAR or LOG. Specifies linear or logarithmic interpolation between frequencies. Character Default="LINEAR") NEF Number of excitation frequencies within each subrange including the end The first subrange is between F 1 and the first modal frequency within the bounds. Th nd subrange is between first and second modal frequencies between the bounds, The last subrange is between the last modal frequency within the bounds and F2. (Integer >1: Default= 10) CLUSTER Specifies clustering of the excitation frequency near the end points of the range. See Remark3 (Real >0.0: Default=1.0) 3)仅用于模态频率响应 4)由情况控制卡 FREQUENCY=SD选取 5)对各种 CLUSTER 个=12个+)+12个1ue,seN 其中, 1+ 2(k-1)/(NEF- 1)is a parametric coordinate between-1 and 1 varies from1 to NEF(k=1,2.……NEF) is the lower limit of the frequency subrange is the upper limit of the subrange s the k-th excitation frequency 个 is the frequency or the logarithm of the frequency, de pending on the value specified by TYPE 6))例子(F1=10F2=20NEF=11, TYPE=LINEAR)8.3.3.4 FREQ3卡 1) 定义频率响应问题中频率集，通过指定两模态频率间的激励频率数 2) 格式 3) 仅用于模态频率响应 4) 由情况控制卡FREQUENCY = SID选取 5) 对各种CLUSTER 其中， 6)) 例子（F1=10,F2=20,NEF=11,TYPE=LINEAR）