Modal Analysis

词汇表条目

A modal analysis allows for the dynamic analysis of structural systems capable of vibrating. As a result, natural vibration values are determined, such as natural frequency, a mode shape, modal mass, and effective modal mass factors.

The modal analysis is the basis for further dynamic analysis, such as for loading by a response spectrum or a time diagram. This is a completely linear method; the nonlinearities existing in the system are not taken into account.

Modal Analysis in RF-/DYNAM Pro

It is possible to perform the modal analysis in RFEM or RSTAB by using the RF-/DYNAM Pro add-on module. In addition to the results of modal parameters in tables, the natural vibration modes are also available graphically for the evaluation.

Furthermore, the modal analysis represents a method for solving time history. In this case, the determined eigenvalues and mode shapes of the model are directly used.

关键词

Eigenvalue analysis Eigenvalue problem Dynamics

目录

链接

RFEM 主程序 RFEM
RFEM 5.xx

主程序

结构设计与有限元­分析软件(FEA)可以用于建立 平面与空间结构模型,适用于由杆件、面、 板、墙、折板、膜、壳、实体以及接触单元等的建模与分析计算。

首个许可价格
3,540.00 USD
RSTAB 主程序
RSTAB 8.xx

主程序

空间结构设计与分析软件,主要用于框架、梁与桁架等空间结构的建模与计算。可以输出内力、变形与制作反力的线性与非线性的计算结果。

首个许可价格
2,550.00 USD
RSTAB 动力分析
DYNAM Pro - Natural Vibrations 8.xx

附加模块

固有振动分析 - 杆件结构的自振频率和主振型

首个许可价格
850.00 USD
RSTAB 动力分析
DYNAM Pro - Forced Vibrations 8.xx

附加模块

动力和地震分析 - 时程分析法和多振型反应谱分析方法

首个许可价格
1,120.00 USD
RFEM 动力分析
RF-DYNAM Pro - Natural Vibrations  5.xx

附加模块

固有振动分析 - 杆件、面和实体模型的自振频率和主振型

首个许可价格
1,030.00 USD
RFEM 动力分析
RF-DYNAM Pro - Forced Vibrations 5.xx

附加模块

动力和地震分析 - 时程分析法和多振型反应谱分析方法

首个许可价格
1,120.00 USD