CDH/VAO - CDH-AG

CDH/VAO is an intuitive interactive computational engineering tool for largeproblem structural dynamics analysis. CDH/VAO enables engineers working in the virtual product development process to provide fast and reliable solutions to design engineering and test department problems.

Using CDH/VAO users are quickly able to study the structural effects of proposed design changes and to automatically predict a set design modifications to provide optimum dynamic behavior of the structural system. Using the Adaptive Modal Correction Method computational savings of factor 25 to 120 have been demonstrated compared to conventional modal analysis.

CDH/VAO uses standard NASTRAN or PERMAS finite element models and the eigenvalues and eigenvectors calculated for the baseline structure to perform a wide range of structural dynamics analyses. Where the structure is coupled to a fluid, fluid eigenvectors are used to assemble the appropriate equations of the coupled system. CDH/VAO uses the advanced state of the art numerical solver algorithms available in MATLAB.

For detailed information about CDH/VAO and the Vibro-Acoustic Optimation Process please download attached brochure.

CDH/VAO Brochure

Benchmark example to evaluate effort and efficiency of CAE process:
Task: Modification of body floor to adapt new swaging design following reassessment of NVH performance.

With the CDH/VAO software, design engineers are empowered to

interactively modify structural models based on designer or engineers requests or ideas,
obtain immediate results for proposed modifications instead of waiting hours or days,
understand the cause-effect behavior of a structure with respect to automotive NVH ,
requirements much faster than using conventional analysis,
respond immediately to what-if inquiries from design, test and management departments,
create an optimal solution for a product development more efficiently.