The vehicle body serves as the core response system of the full-vehicle NVH system, and its inherent vibration and noise response characteristics directly determine the overall NVH performance of the complete vehicle. Conducting vehicle NVH performance analysis and optimization in the virtual R&D phase via structural NVH simulation can largely avoid NVH risks triggered by unreasonable body structure design. This drastically cuts down engineering changes and test verification workload in the later stage, and effectively saves various R&D costs including prototype manufacturing, test equipment and labor expenses.

Road noise NVH simulation relies on high-precision full-vehicle finite element models, adopts measured real road surface spectrum as excitation load, and performs computational analysis via professional simulation software. It identifies the generation sources and transmission paths of vibration and noise during vehicle operation, as well as interior vibro-acoustic responses and their impacts on occupants. Based on the simulation results, targeted optimization can be implemented on components including chassis structure, suspension bushing stiffness and body structure, which effectively reduces road noise and road-induced vibration while further improving vehicle ride comfort.

As consumers have increasingly higher requirements for vehicle riding quality, rattling issues in automobiles have attracted growing market attention. During vehicle development, Landtop Technology builds a comprehensive full-vehicle rattle simulation control system for clients. Leveraging finite element simulation technology to analyze the mechanical response spectrum of vehicles under various road conditions, we accurately predict the positions and occurrence probability of rattles, detect and optimize potential rattle risks in advance. This effectively shortens vehicle development cycles and cuts project R&D costs.

Statistical Energy Analysis (SEA) is adopted to predict the performance of acoustic packages, enabling evaluation of acoustic package effectiveness at the design stage and avoiding costly late-stage modifications triggered by post-development defects. Acoustic package simulation has gradually become an indispensable link in NVH development. It improves the vehicle’s acoustic performance while reducing R&D costs and boosting development efficiency.

As the components connecting powertrain and vehicle body, mounting systems serve as the primary structural-borne noise transmission path for powertrain NVH. Higher stiffness of mounts benefits durability and transient operating conditions yet impairs vehicle NVH performance. Mount simulation is adopted to strike a balance between durability and NVH performance.

Intake and exhaust systems are core components for reducing airborne noise of internal combustion engines. Simulation-based NVH performance analysis of intake and exhaust systems at the digital prototype stage can mitigate risks during physical vehicle tuning.