Optimization of Dynamic Seating Comfort: Optimal Interaction Between Frequency Ranges, Resonance, and Isolation

To prevent disturbances to passengers caused by vibrations as early as the virtual development phase, it is crucial to optimize the interaction between the seat and the vehicle in terms of vibration transmission and resonance at an early stage. CASIMIR/Automotive offers the ability to evaluate the seat itself through the seat transfer function and simultaneously optimize the interaction of the seat and human with the vehicle by integrating it into the vehicle's multibody simulation.

Frequency ranges and their impact on comfort

When considering dynamic seating comfort, it is essential to define the relevant frequency range depending on the driving situation.

For typical ride comfort, that is, the interaction between the chassis, body, and seat, the frequency range up to the first vertical resonance of the human on the seat is generally significant, typically between 3 and 5 Hz.

In contrast, the vibration comfort of the seat typically starts at around 6 Hz and extends up to about 30 Hz. Vibrations at higher frequencies are only weakly transmitted by the seat to the human and are difficult to perceive due to their small displacement amplitude.

The goal of any dynamic seat optimization is to find the optimal compromise between minimal resonance amplification and effective isolation at higher frequencies, with the weighting varying depending on the vehicle type and manufacturer.

Personal Consulting & Offer

Prerequisite

For a valid simulation of dynamic seating comfort, the FE model of the seat structure must be dynamically validated through a modal analysis. Such models are often already available from NVH analyses. Additionally, the material properties of the foams must be supplemented with dynamic material parameters. The CASIMIR Material Manager supports this by taking over the material identification and creating the complete material card.

Assessment

The assessment of vibration comfort typically takes place using the seat transfer function. With CASIMIR/Automotive, this function can be directly determined. The goal is to achieve an optimal compromise between resonance amplification and effective isolation without local resonances occurring within the seat structure.

Ride Comfort analysis in driving situations

To analyse ride comfort, the interaction between the human, seat, and vehicle in various driving situations is examined. For this purpose, the human model is integrated as a flexible body into a multibody simulation (MBS) model of the vehicle (e.g., Adams / Simpack). This integration enables a realistic interaction between the vehicle, seat, and human, which significantly differs from the typical coupling of individual masses. Additionally, measurement points on the human model can be evaluated.

OUR AUTOMOTIVE DISTRIBUTOR ON THE CHINESE MARKET

Address: Building T4, Lujiazui Digital World · Wisdom Ridge, Lane 969 Yuqiao Road, Pudong New Area, Shanghai

Phone: +86 18064081644

VISIT THE WEBSITE

Please contact us personally

________

We will be happy to support you in solving your tasks relating to virtual seat development, seating comfort and virtual human models.

M. Sc. Martin Anderson
Sales

+49 931 49708-184
Contact form

EXPERT IN AUTOMOTIVE SOFTWARE, DIGITAL TRANSFORMATION AND AI-BASED ENGINEERING SOLUTIONS

Responsible for the global sales of the NVH simulation software CASIMIR as well as for business development within the Seat Comfort Solutions business unit

More than 10 years of international B2B experience in the automotive and wind energy industries, providing complex engineering and software solutions for OEMs and Tier 1 suppliers at the interface of technology and business models, particularly in Asia and North America

Holds a Master of Science (M.Sc.) degree in Industrial Engineering and Management with a focus on automation technology and product management, complemented by additional training as a value analyst

Dipl.-Ing. Jörg Hofmann
Product Management

+49 931 49708-280
Contact form

GLOBALLY RECOGNISED EXPERT IN SEATING COMFORT AND WHOLE-BODY VIBRATION

Product Manager for Virtual Seating Comfort with CASIMIR

25 years of professional experience in seating comfort and occupational health and safety

Speaker at renowned international conferences on seating comfort and whole-body vibration

Contributor to standardisation working groups, including the revision of ISO 2631-5

Core developer of the internationally used seating comfort tool CASIMIR

Degree in General Mechanical Engineering

M. Sc. Aravinda Veeraraghavan
Technical Support

+49 931 49708-182
Contact form

DEVELOPMENT ENGINEER (DIGITAL PRODUCTS)

Holds a Master of Science degree in Computational Mechanics of Materials and Structures from the University of Stuttgart

Responsible for the development of CASIMIR/Automotive (Wölfel’s software tool for seating comfort analysis and optimisation)

Provides close customer support and technical consulting

Optimises customer processes in the field of seating comfort

Conducts simulations in seat development with a focus on H-point, static and dynamic seating comfort, as well as the numerical modelling of human bodies