Describe a complex NVH problem you have solved and the approach you took to solve it.

In my previous role as an Automotive NVH Engineer, I encountered a complex NVH problem related to a loud noise coming from the vehicle's engine compartment. To solve this issue, I first conducted a detailed analysis of the noise using NVH analysis software. This helped me identify the specific frequency range and amplitude of the noise. Next, I performed physical tests on the vehicle to gather additional data and validate the results from the software analysis. Based on the findings, I determined that the noise was caused by a resonance effect between the engine and the surrounding components. To address this, I proposed modifying the design of certain engine components to reduce the resonance and dampen the noise. I worked closely with the design and development teams to implement these changes and conducted further tests to verify the effectiveness of the modifications. The final result was a significant reduction in the noise level, meeting the required NVH criteria.

In my previous role as an Automotive NVH Engineer, I faced a challenging NVH problem related to a loud noise originating from the engine compartment of a vehicle. To tackle this issue, I utilized LMS Test.Lab, an industry-standard NVH analysis software, to perform a detailed analysis of the noise. The software helped me identify that the noise was in the low-frequency range (around 200 Hz) and had a high amplitude. To gather additional data and validate the results, I conducted physical tests using specialized NVH testing equipment, such as sound intensity measurement devices. The tests confirmed that the source of the noise was a resonance effect between the engine structure and the air intake system. To address this issue, I proposed modifying the structural design of the engine mounts and the air intake system to alter their natural frequencies. By collaborating closely with the design and development teams, we implemented these design changes and performed extensive validation tests, including dynamic stiffness measurements and vibration analysis. The final result was a substantial reduction in the noise level, exceeding the prescribed NVH criteria.

During my tenure as an Automotive NVH Engineer, I encountered a complex NVH problem that involved a persistent noise issue originating from the engine compartment. To address this problem effectively, I took a comprehensive approach that involved multiple phases of analysis, testing, and collaboration. Initially, I employed advanced NVH analysis software, LMS Test.Lab, to conduct a detailed noise analysis. This allowed me to identify the specific frequency range (around 200 Hz) and amplitude of the noise, providing valuable insights into the problem. To corroborate the findings, I conducted physical tests using a range of NVH testing equipment, including sound intensity measurement devices and accelerometers. These tests confirmed that the noise was caused by a resonance effect between the engine structure and the air intake system. To mitigate this issue, I developed a multidimensional solution that encompassed modifying the structural design of the engine mounts and air intake system. This involved incorporating advanced simulation techniques using ANSYS to optimize the modifications before implementation. Through close collaboration with the design and development teams, we implemented the proposed design changes and conducted extensive validation tests, such as dynamic stiffness measurements and vibration analysis. As a result, we achieved a remarkable reduction in the noise level, surpassing the defined NVH criteria. To ensure the accuracy and validity of our findings, I also performed statistical data analysis to quantify the improvement and prepared comprehensive reports for technical audiences to communicate the problem-solving process and outcomes.