Rough road is one of major external excitation sources to vehicles. To diminish the excitation passing to vehicle body, body mounts, shock absorbers, suspensions, dampers, among others are often used. This study focuses on the study of tubular hydraulic damper. This research utilized Computer-Aided-Design tool to create a damper model based on an existing hardware. HyperWork/AcuSlove and RADIOSS were used for fluid-structure coupling analysis and optimization. From the study, the damping force was improved 8.8% from 96.5 N to 105 N. Utilizing Computer-Aided-Engineering and optimization method can lead the design to meet the functional requirements, make the design changes effectively, and also support and help the hardware tests during the vehicle design process.