I'm working on a cast aluminum gearbox that has high frequency airborne gear whine. (throughout ~500-900Hz, with a few peaks). We checked for resonances on the case, but they don't line up with noise peaks. Adding nice ribs has not helped. We can't use a sound blanket or other acoustic treatment to block the noise due to the operating environment . Looking for advice on how to modify the case. Also, why don't the ribs help?
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.
When it comes to using an FDM 3D printer effectively and efficiently, choosing the right material at the right time is essential. This 3D Printing Materials Guide will help give you and your team a basic understanding of some FDM 3D printing polymers and composites, their strengths and weaknesses, and when to use them. Download Now
Simcenter STAR-CCM+ makes simulation accessible to process engineers with limited simulation experience but strong process knowledge. This flood of knowledge and skills will make the industry more cost efficient, less polluting and ultimately more innovative. Download Now
The need to reduce exploration and development costs has never been more important to the future of the oil and gas industry. In this special report we present how engineers and scientists from leading oil and gas companies are deploying Siemensâ€™ simulation software in the design and operation of a range of oil and gas products and systems. Download Now
Customized products are more compelling to customers and drive higher profitability. This engineer-to-order (ETO) study finds that some companies have found better ways to design custom products, alleviating the engineering bottleneck created in most companies when quotes requests or orders roll in. Download Now