一阶模态 meaning in Chinese
first modal shape
Examples
- Mode is structure ’ s inherence characteristics , each mode has specifically resonant frequencies , damping values , mode shapes , mode stiffness and mode mass
模态是结构的固有振动特性,每一阶模态都具有特定的固有频率、阻尼比、振型、模态刚度和模态质量。 - The 1st to 12th vibration modes and periods which influence greatly on the truss are listed to investigate the distributions of the truss mass and stiffness
在对该结构体系进行模态分析后，提取对结构有影响的前12阶模态，列出每一阶模态的自振周期及主振型，用于考察结构的质量分布和结构刚度。 - The coupling nonlinear vibration equations involving both the first in - plane and the first out - of - plane modes is generated by using the galerkin method . according to the derived equations , the internal resonance subjected to the in - plane excitation is analyzed by the multiple scale method . the results reveal that the internal resonance of the stay cables posses the characteristics of multiple values and divergence
通过galerkin方法，得到了一个反映面内一阶及面外一阶模态的耦合非线性动力系统，用多尺度法对面内激励下的内共振进行了分析，以实际桥梁拉索为例，得出了拉索模态耦合非线性振动具有多值、分叉等特点，并分析了拉索阻尼对模态耦合内共振的影响。 - The result of optimization and analysis show : 1 ) across - axis sensitivity is smaller , less than 2 % of the primary axis sensitivity ; 2 ) the first mode is dominant at primary axis , which reduce intersectional coupling ; 3 ) when damp ratio is between 0 . 3 and 0 . 7 , accelerometer has better dynamic characteristic
分析结果表明此种结构的具有： 1 )横向灵敏度小， x 、 z方向的横向灵敏度均不到敏感方向的2 ； 2 )在敏感方向上，一阶模态起主导作用，其它模态的影响较小，有利于减小交叉耦合的影响； 3 )当阻尼比毛为0 . 3 ? 0 . 7时，传感器具有较好的动态特性。 - According to elastic mechanics theory and langrage equation , the first order shape function dynamic equation of tension weight of belt conveyor is derived , and the four series of experienced formulas is established , which provide theoretical instructions for determining the location of tension weight and the depth of concealed pit . 1fig . , 2tabs . , 5refs
根据弹性理论和拉格朗日方程，导出了带式输送机平衡锤的一阶模态动力学方程，求出了4组便于估算平衡锤振幅的经验公式，该经验公式为平衡锤的静平衡位置及暗井深度的确定提供了理论指导.图1 ，表2 ，参5